Revert of Raise gyp/GN failure if proprietary_codecs=1 and ffmpeg_branding=Chromium

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 317c1c1f0151a8d6c8790f0107fd0da7f231011a..afcadfdf74ec632b247a4b95ffc0ca83cea5cff6 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -11,7 +11,6 @@
 import("//media/media_options.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
-import("//third_party/ffmpeg/ffmpeg_options.gni")
 
 buildflag_header("media_features") {
   header = "media_features.h"
@@ -21,12 +20,6 @@
     "ENABLE_HEVC_DEMUXING=$enable_hevc_demuxing",
     "ENABLE_MSE_MPEG2TS_STREAM_PARSER=$enable_mse_mpeg2ts_stream_parser",
   ]
-}
-
-if (proprietary_codecs && media_use_ffmpeg) {
-  assert(
-      ffmpeg_branding != "Chromium",
-      "proprietary codecs and ffmpeg_branding set to Chromium are incompatible")
 }
 
 # Common configuration for targets in the media directory.