Remove empty CSS rules

Some previous automated CLs removed single lines from the CSS
properties of some rules. Some of these rules were then left empty.

This CL removes the empty rules to improve code readability and make
other improvements easier to implement.

Bug: 822495
Change-Id: I003e12135db8c55daa5c751d931683718b46e0e7
Reviewed-on: https://chromium-review.googlesource.com/1140346
Commit-Ready: Josh Pratt <jopra@chromium.org>
Tested-by: Josh Pratt <jopra@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
4 files changed