Remove yasm (and DONT_EMBED_BUILD_METADATA).

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index 6e9336fa2b82b33ffea491cd403967b19ff13252..209118d2f64f5ddad3f1754d24a125a2dbfcda3a 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -15,17 +15,6 @@ declare_args() {
   # catching bugs but in some cases may cause conflicts or excessive slowness.
   disable_iterator_debugging = false
 
-  # Set to true to not store any build metadata, e.g. ifdef out all __DATE__
-  # and __TIME__. Set to 0 to reenable the use of these macros in the code
-  # base. See http://crbug.com/314403.
-  #
-  # Continue to embed build meta data in Official builds, basically the
-  # time it was built.
-  # TODO(maruel): This decision should be revisited because having an
-  # official deterministic build has high value too but MSVC toolset can't
-  # generate anything deterministic with WPO enabled AFAIK.
-  dont_embed_build_metadata = !is_official_build
-
   # Set to true to enable dcheck in Release builds.
   dcheck_always_on = false
 
@@ -47,9 +36,6 @@ config("feature_flags") {
   if (cld_version > 0) {
     defines += [ "CLD_VERSION=$cld_version" ]
   }
-  if (dont_embed_build_metadata) {
-    defines += [ "DONT_EMBED_BUILD_METADATA" ]
-  }
   if (dcheck_always_on) {
     defines += [ "DCHECK_ALWAYS_ON=1" ]
   }