Revert of Convert the re2 GYP targets to be generated by GN. (https://codereview.chromium.org/68853015/)

Reason for revert:
Broke Blink compile

Original issue's description:
> Convert the re2 GYP targets to be generated by GN.
> 
> BUG=288991
> R=bradnelson@google.com
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245254

TBR=bradnelson@chromium.org,bradnelson@google.com
NOTREECHECKS=true
NOTRY=true
BUG=288991

Review URL: https://codereview.chromium.org/141063002

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: dadf8c49e3a2deb3c79c3e95e1702cab95eeaab7