Revert "remove_files.py: Print warnings on removals"

This reverts commit d51b47ac676244cccb156bbd29d0e53231068330.

Reason for revert: crbug.com/1335550

Original change's description:
> remove_files.py: Print warnings on removals
>
> This will make it easier to debug build issues happening because if this
> script in the future.
>
> Bug: chromium:1314527
> Change-Id: I5bbb4082ac816f98860e621917bc35b26ba7cb29
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87700
> Auto-Submit: Corentin Wallez <cwallez@chromium.org>
> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
> Commit-Queue: Dan Sinclair <dsinclair@chromium.org>

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:1314527
Change-Id: I47e352f57becaa064b6c8ceb022dcbed9bd212d3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/93441
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
diff --git a/generator/remove_files.py b/generator/remove_files.py
index 21eef84..6ddf463 100644
--- a/generator/remove_files.py
+++ b/generator/remove_files.py
@@ -78,7 +78,6 @@
 
         for candidate in get_all_files_in_dir(stale_dir):
             if not check_is_allowed(candidate, allowed_dirs):
-                print("Warning: remove_files.py removed " + candidate)
                 os.remove(candidate)
 
     # Finished! Write the stamp file so ninja knows to not run this again.