Revert "Change whitespace.txt"

This reverts commit 07bd252238.

Reason for revert: Still testing chromium-behavior

Original change's description:
> Change whitespace.txt
>
> Will use this change to test reverting in the Gerrit UI.
> Using TBR= so as to not spam anyone else.
>
> TBR=
>
> Change-Id: If95898b00d6468512157d120e24c8246c1655f8f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2645231
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
> Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>

TBR=

No-Try: true
No-Presubmit: true
Change-Id: Iaf547a6f5916490c85baeb8a32758c4b40abe4c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2657869
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>

whitespace.txt

@@ -1 +0,0 @@
-Hello world!