Remove unused code from TimelineTableRowView.

NetNewsWire/MainWindow/Timeline/TimelineTableRowView.swift

@@ -10,18 +10,6 @@ import AppKit
 
 class TimelineTableRowView : NSTableRowView {
 
-	var cellAppearance: TimelineCellAppearance! {
-		didSet {
-			if cellAppearance != oldValue {
-				invalidateGridRect()
-			}
-		}
-	}
-
-//	override var interiorBackgroundStyle: NSBackgroundStyle {
-//		return .Light
-//	}
-
 	private var cellView: TimelineTableCellView? {
 		for oneSubview in subviews {
 			if let foundView = oneSubview as? TimelineTableCellView {
@@ -33,6 +21,9 @@ class TimelineTableRowView : NSTableRowView {
 
 	override var isEmphasized: Bool {
 		didSet {
+			if #available(macOS 10.14, *) {
+				return
+			}
 			if let cellView = cellView {
 				cellView.isEmphasized = isEmphasized
 			}
@@ -41,40 +32,12 @@ class TimelineTableRowView : NSTableRowView {
 
 	override var isSelected: Bool {
 		didSet {
+			if #available(macOS 10.14, *) {
+				return
+			}
 			if let cellView = cellView {
 				cellView.isSelected = isSelected
 			}
 		}
 	}
-
-	var gridRect: NSRect {
-		return NSMakeRect(0.0, NSMaxY(bounds) - 1.0, NSWidth(bounds), 1)
-	}
-
-	override func drawSeparator(in dirtyRect: NSRect) {
-
-		let path = NSBezierPath()
-		let originX = floor(cellAppearance.boxLeftMargin) + 2.0
-		let destinationX = ceil(NSMaxX(bounds))
-		let y = floor(NSMaxY(bounds)) - 0.5
-		path.move(to: NSPoint(x: originX, y: y))
-		path.line(to: NSPoint(x: destinationX, y: y))
-
-		cellAppearance.gridColor.set()
-		path.stroke()
-	}
-
-	override func draw(_ dirtyRect: NSRect) {
-
-		super.draw(dirtyRect)
-
-		if cellAppearance.drawsGrid && !isSelected && !isNextRowSelected {
-			drawSeparator(in: dirtyRect)
-		}
-	}
-
-	func invalidateGridRect() {
-		
-		setNeedsDisplay(gridRect)
-	}
 }