diff --git a/FoundationExtras/Sources/FoundationExtras/Calendar+RSCore.swift b/FoundationExtras/Sources/FoundationExtras/Calendar+RSCore.swift
index 9de5e199d..c59d1263e 100644
--- a/FoundationExtras/Sources/FoundationExtras/Calendar+RSCore.swift
+++ b/FoundationExtras/Sources/FoundationExtras/Calendar+RSCore.swift
@@ -21,10 +21,4 @@ public extension Calendar {
 	static func dateIsToday(_ date: Date) -> Bool {
 		return cached.isDateInToday(date)
 	}
-
-	/// The first moment of today.
-	static var startOfToday: Date {
-		cached.startOfDay(for: Date())
-	}
-	
 }
diff --git a/FoundationExtras/Sources/FoundationExtras/Character+RSCore.swift b/FoundationExtras/Sources/FoundationExtras/Character+RSCore.swift
deleted file mode 100644
index 233de03ee..000000000
--- a/FoundationExtras/Sources/FoundationExtras/Character+RSCore.swift
+++ /dev/null
@@ -1,21 +0,0 @@
-//
-//  Character+RSCore.swift
-//  RSCore
-//
-//  Created by Maurice Parker on 4/20/20.
-//  Copyright © 2020 Ranchero Software, LLC. All rights reserved.
-//
-
-import Foundation
-
-public extension Character {
- 
-	var isSimpleEmoji: Bool {
-        guard let firstScalar = unicodeScalars.first else { return false }
-        return firstScalar.properties.isEmoji && firstScalar.value > 0x238C
-    }
-
-    var isCombinedIntoEmoji: Bool { unicodeScalars.count > 1 && unicodeScalars.first?.properties.isEmoji ?? false }
-
-    var isEmoji: Bool { isSimpleEmoji || isCombinedIntoEmoji }
-}
diff --git a/FoundationExtras/Sources/FoundationExtras/Data+RSCore.swift b/FoundationExtras/Sources/FoundationExtras/Data+RSCore.swift
index 18211d012..a88136f4e 100644
--- a/FoundationExtras/Sources/FoundationExtras/Data+RSCore.swift
+++ b/FoundationExtras/Sources/FoundationExtras/Data+RSCore.swift
@@ -7,40 +7,15 @@
 //
 
 import Foundation
-#if canImport(CryptoKit)
 import CryptoKit
-#endif
-import CommonCrypto
 
 public extension Data {
 
 	/// The MD5 hash of the data.
 	var md5Hash: Data {
 
-		#if canImport(CryptoKit)
-		if #available(macOS 10.15, *) {
-			let digest = Insecure.MD5.hash(data: self)
-			return Data(digest)
-		} else {
-			return ccMD5Hash
-		}
-		#else
-		return ccMD5Hash
-		#endif
-
-	}
-
-	@available(macOS, deprecated: 10.15)
-	@available(iOS, deprecated: 13.0)
-	private var ccMD5Hash: Data {
-		let len = Int(CC_MD5_DIGEST_LENGTH)
-		let md = UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: len)
-
-		let _ = self.withUnsafeBytes {
-			CC_MD5($0.baseAddress, numericCast($0.count), md)
-		}
-
-		return Data(bytes: md, count: len)
+		let digest = Insecure.MD5.hash(data: self)
+		return Data(digest)
 	}
 
 	/// The MD5 has of the data, as a hexadecimal string.
diff --git a/FoundationExtras/Sources/FoundationExtras/FileManager+RSCore.swift b/FoundationExtras/Sources/FoundationExtras/FileManager+RSCore.swift
index 21759ee56..69a90c310 100644
--- a/FoundationExtras/Sources/FoundationExtras/FileManager+RSCore.swift
+++ b/FoundationExtras/Sources/FoundationExtras/FileManager+RSCore.swift
@@ -10,7 +10,6 @@ import Foundation
 
 public extension FileManager {
 
-
 	/// Returns whether a path refers to a folder.
 	///
 	/// - Parameter path: The file path to check.
@@ -27,35 +26,6 @@ public extension FileManager {
 		return false
 	}
 
-	/// Copies files from one folder to another, overwriting any existing files with the same name.
-	///
-	/// - Parameters:
-	/// 	- source: The path of the folder from which to copy files.
-	/// 	- destination: The path to the folder at which to place the copied files.
-	///
-	/// - Note: This function does not copy files whose names begin with a period.
-	func copyFiles(fromFolder source: String, toFolder destination: String) throws {
-		assert(isFolder(atPath: source))
-		assert(isFolder(atPath: destination))
-
-		let sourceURL = URL(fileURLWithPath: source)
-		let destinationURL = URL(fileURLWithPath: destination)
-
-		let filenames = try self.contentsOfDirectory(atPath: source)
-
-		for oneFilename in filenames {
-			if oneFilename.hasPrefix(".") {
-				continue
-			}
-
-			let sourceFile = sourceURL.appendingPathComponent(oneFilename)
-			let destinationFile = destinationURL.appendingPathComponent(oneFilename)
-
-			try copyFile(atPath: sourceFile.path, toPath: destinationFile.path, overwriting: true)
-		}
-
-	}
-
 	/// Retrieve the names of files contained in a folder.
 	///
 	/// - Parameter folder: The path to the folder whose contents to retrieve.
@@ -86,27 +56,4 @@ public extension FileManager {
 		let url = URL(fileURLWithPath: folder)
 		return filenames.map { url.appendingPathComponent($0).path }
 	}
-
-}
-
-private extension FileManager {
-
-	/// Copies a single file, possibly overwriting any existing file.
-	///
-	/// - Parameters:
-	///   - source: The source path.
-	///   - destination: The destination path.
-	///   - overwriting: `true` if an existing file at `destination` should be overwritten.
-	func copyFile(atPath source: String, toPath destination: String, overwriting: Bool) throws {
-		assert(fileExists(atPath: source))
-
-		if fileExists(atPath: destination) {
-			if (overwriting) {
-				try removeItem(atPath: destination)
-			}
-		}
-
-		try copyItem(atPath: source, toPath: destination)
-	}
-
 }
diff --git a/FoundationExtras/Sources/FoundationExtras/PropertyList.swift b/FoundationExtras/Sources/FoundationExtras/PropertyList.swift
deleted file mode 100644
index 2246b0e5b..000000000
--- a/FoundationExtras/Sources/FoundationExtras/PropertyList.swift
+++ /dev/null
@@ -1,32 +0,0 @@
-//
-//  PropertyList.swift
-//  RSCore
-//
-//  Created by Brent Simmons on 7/12/17.
-//  Copyright © 2017 Ranchero Software, LLC. All rights reserved.
-//
-
-import Foundation
-
-// These functions eat errors.
-
-public func propertyList(withData data: Data) -> Any? {
-	
-	do {
-		return try PropertyListSerialization.propertyList(from: data, options: [], format: nil)
-	} catch {
-		return nil
-	}
-}
-
-// Create a binary plist.
-
-public func data(withPropertyList plist: Any) -> Data? {
-	
-	do {
-		return try PropertyListSerialization.data(fromPropertyList: plist, format: .binary, options: 0)
-	}
-	catch {
-		return nil
-	}
-}
diff --git a/FoundationExtras/Sources/FoundationExtras/Set+Extensions.swift b/FoundationExtras/Sources/FoundationExtras/Set+Extensions.swift
index 4e127e0bb..c936b4c83 100755
--- a/FoundationExtras/Sources/FoundationExtras/Set+Extensions.swift
+++ b/FoundationExtras/Sources/FoundationExtras/Set+Extensions.swift
@@ -10,15 +10,6 @@ import Foundation
 
 public extension Set {
 
-	func anyObjectPassingTest( _ test: (Element) -> Bool) -> Element? {
-
-		guard let index = self.firstIndex(where: test) else {
-			return nil
-		}
-
-		return self[index]
-	}
-	
 	func anyObject() -> Element? {
 		
 		if self.isEmpty {
diff --git a/FoundationExtras/Sources/FoundationExtras/String+RSCore.swift b/FoundationExtras/Sources/FoundationExtras/String+RSCore.swift
index 12fd2d172..3d0c141d3 100644
--- a/FoundationExtras/Sources/FoundationExtras/String+RSCore.swift
+++ b/FoundationExtras/Sources/FoundationExtras/String+RSCore.swift
@@ -353,17 +353,3 @@ public extension String {
 	}
 
 }
-
-public extension String {
-    var isSingleEmoji: Bool { count == 1 && containsEmoji }
-
-    var containsEmoji: Bool { contains { $0.isEmoji } }
-
-    var containsOnlyEmoji: Bool { !isEmpty && !contains { !$0.isEmoji } }
-
-    var emojiString: String { emojis.map { String($0) }.reduce("", +) }
-
-    var emojis: [Character] { filter { $0.isEmoji } }
-
-    var emojiScalars: [UnicodeScalar] { filter { $0.isEmoji }.flatMap { $0.unicodeScalars } }
-}