build: remove an obsolete workaround

Chrome OS swapped its default linker to lld for Chrome quite a while
ago. At this point, we no longer support anything _but_ lld in our SDK
for linking Chrome. Hence, this workaround now seems unnecessary.

Bug: 837095
Change-Id: I4fb50552c9f88c230683a29d8135c77cec3fa7d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960181
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723588}

build/config/compiler/BUILD.gn

@@ -413,14 +413,7 @@ config("compiler") {
 
   # Linux-specific compiler flags setup.
   # ------------------------------------
-  if (((is_posix || is_fuchsia) && use_lld) ||
-      (target_os == "chromeos" && is_android)) {
-    # NOTE: Some Chrome OS builds globally disable LLD, but they also build some
-    # targets against Android toolchains which should use LLD. Therefore we
-    # explicitly select LLD in these cases.
-    #
-    # TODO(https://crbug.com/837095): This should be cleaned up if/when LLD can
-    # work properly for Chrome OS builds.
+  if ((is_posix || is_fuchsia) && use_lld) {
     ldflags += [ "-fuse-ld=lld" ]
     if (current_cpu == "arm64") {
       # Reduce the page size from 65536 in order to reduce binary size slightly