Cleaning up modules_tests resources.

* Removed video files which were not used by any tests.
* Removed ConferenceMotion_1280_720_50.yuv for mobile builds.

Bug: webrtc:8936
Change-Id: I0539e9fce20470fcc2f0af84bd297faffc4b587a
Reviewed-on: https://webrtc-review.googlesource.com/60942
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22359}
diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index 2feb1db..b6d1f4a 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -597,16 +597,13 @@
     ]
   }
 
-  video_coding_modules_tests_resources = [
-    "../../resources/foreman_128x96.yuv",
-    "../../resources/foreman_160x120.yuv",
-    "../../resources/foreman_176x144.yuv",
-    "../../resources/foreman_320x240.yuv",
-  ]
+  video_coding_modules_tests_resources = [ "../../resources/paris_qcif.yuv" ]
 
   if (!(is_ios || is_android)) {
-    video_coding_modules_tests_resources +=
-        [ "../../resources/FourPeople_1280x720_30.yuv" ]
+    video_coding_modules_tests_resources += [
+      "../../resources/FourPeople_1280x720_30.yuv",
+      "../../resources/ConferenceMotion_1280_720_50.yuv",
+    ]
   }
 
   if (is_ios || is_mac) {