`DeviceKeys` is now internal, removing unused code.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/model/MXDeviceInfo.kt

@@ -144,19 +144,6 @@ data class MXDeviceInfo(
         return map
     }
 
-    /**
-     * @return a dictionary of the parameters
-     */
-    fun toDeviceKeys(): DeviceKeys {
-        return DeviceKeys(
-                userId = userId,
-                deviceId = deviceId,
-                algorithms = algorithms!!,
-                keys = keys!!,
-                signatures = signatures!!
-        )
-    }
-
     override fun toString(): String {
         return "MXDeviceInfo $userId:$deviceId"
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/model/rest/DeviceKeys.kt

@@ -20,7 +20,7 @@ import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 
 @JsonClass(generateAdapter = true)
-data class DeviceKeys(
+internal data class DeviceKeys(
         /**
          * Required. The ID of the user the device belongs to. Must match the user ID used when logging in.
          */