Revert of Add unit tests for RTCMTLVideoView.

webrtc/sdk/BUILD.gn

Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index a789efb57e4c668a7b12b3f9e5539c067e519d9a..4acf3783f545259ac77f82027932f9ba2a03628d 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -94,7 +94,6 @@
 
   rtc_static_library("rtc_sdk_peerconnection_objc") {
     sources = [
-      "objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h",
       "objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.h",
       "objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm",
       "objc/Framework/Classes/RTCAVFoundationVideoSource+Private.h",
@@ -258,12 +257,6 @@
         "objc/Framework/UnitTests/RTCSessionDescriptionTest.mm",
         "objc/Framework/UnitTests/avformatmappertests.mm",
       ]
-      if (is_ios) {
-        sources += [ "objc/Framework/UnitTests/RTCMTLVideoViewTests.mm" ]
-        if (current_cpu != "arm64") {
-          sources += [ "objc/Framework/Classes/Metal/RTCMTLVideoView.m" ]
-        }
-      }
       deps = [
         ":rtc_sdk_peerconnection_objc",
         "//third_party/ocmock",