Revert "Run gn check for an android build on presubmit"

This reverts commit 8f4371ea5a1bfc490e39c4c25af8f70b8f74e450.

Breaks the presubmit:

$ git cl presubmit -v
Loaded authentication cookies from ...
Running presubmit commit checks ...
Running /media/Checkouts/razor/src/PRESUBMIT.py

** Presubmit Messages **
If this change has an associated bug, add BUG=[bug number].

** Presubmit ERRORS **
gn gen must not fail.

***************
ERROR at //build/config/android/internal_rules.gni:944:25: Script
returned non-zero exit code.
    sources_build_rel = exec_script("//build/android/gyp/find.py",
                        ^----------
Current dir: /tmp/tmpAMRSQs/
Command: python /media/Checkouts/razor/src/build/android/gyp/find.py
../../media/Checkouts/razor/src/third_party/android_tools/sdk/extras/android/support/v7/appcompat/res
Returned 1.
stderr:

../../media/Checkouts/razor/src/third_party/android_tools/sdk/extras/android/support/v7/appcompat/res
does not exist

See //build/config/android/rules.gni:565:3: whence it was called.
  process_resources("${target_name}__process_resources") {
  ^-------------------------------------------------------
See //third_party/android_tools/BUILD.gn:36:1: whence it was called.
android_resources("android_support_v7_appcompat_resources") {
^------------------------------------------------------------
***************

Presubmit checks took 3.8s to calculate.

TBR=qsr@chromium.org

Review URL: https://codereview.chromium.org/815583003