mpv: remove unreferenced patch

diff --git a/osdep/mac/input_helper.swift b/osdep/mac/input_helper.swift

index 0acec6bd40..0ec5837864 100644

--- a/osdep/mac/input_helper.swift

+++ b/osdep/mac/input_helper.swift

@@ -18,6 +18,14 @@

 import Cocoa

 import Carbon.HIToolbox

+extension NSCondition {

+    fileprivate func withLock<T>(_ body: () throws -> T) rethrows -> T {

+        self.lock()

+        defer { self.unlock() }

+        return try body()

+    }

+}

+

 class InputHelper: NSObject {

     var option: OptionHelper?

     var lock = NSCondition()