Revert of Use remove_build_metadata.py on all the trybots.

scripts/slave/recipes/chromium_trybot.py

Index: scripts/slave/recipes/chromium_trybot.py
diff --git a/scripts/slave/recipes/chromium_trybot.py b/scripts/slave/recipes/chromium_trybot.py
index c1d8598ffa6f60cc44d39d2df1517fe2045ee2f0..4028eb414e29675f6618587e7df9ac6a8ff3771b 100644
--- a/scripts/slave/recipes/chromium_trybot.py
+++ b/scripts/slave/recipes/chromium_trybot.py
@@ -895,13 +895,9 @@
         raise
       raise
 
+    # Collect *.isolated hashes for all isolated targets, used when triggering
+    # tests on swarming.
     if bot_config.get('use_isolate') or has_swarming_tests:
-      # Remove the build metadata from the binaries. Currently it's a noop on
-      # all platforms except Windows where it run zap_timestamp.exe on all the
-      # PE images.
-      api.isolate.remove_build_metadata()
-      # Collect *.isolated hashes for all isolated targets, used when triggering
-      # tests on swarming.
       api.isolate.find_isolated_tests(api.chromium.output_dir)
 
     if bot_config['compile_only']: