Remove UISwitch from the Objective-C bridged interface for tvOS

Author: bcylin

Source/Views/SwitchCell.swift

@@ -37,6 +37,8 @@ public protocol SwitchCellDelegate: class {
 /// A `UITableViewCell` subclass that shows a `UISwitch` as the `accessoryView`.
 open class SwitchCell: UITableViewCell, Configurable {
 
+  #if os(iOS)
+
   /// A `UISwitch` as the `accessoryView`. Not available on tvOS.
   @available(tvOS, unavailable, message: "switchControl is not available on tvOS.")
   public private(set) lazy var switchControl: UISwitch = {
@@ -45,6 +47,8 @@ open class SwitchCell: UITableViewCell, Configurable {
     return control
   }()
 
+  #endif
+
   /// The switch cell's delegate object, which should conform to `SwitchCellDelegate`. Not available on tvOS.
   @available(tvOS, unavailable, message: "SwitchCellDelegate is not available on tvOS.")
   open weak var delegate: SwitchCellDelegate?