android: Remove android_gyp from envsetup.sh.

We've been off gyp for a while, and even when we still were on gyp
people weren't supposed to use android_gyp.
https://codereview.chromium.org/234223002 added this compat fix for
"3-4 weeks", those have by now passed as well.

Bug: 330631
Change-Id: I25e0145a43771a42bcacde113b0154523da5c017
Reviewed-on: https://chromium-review.googlesource.com/579934Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488282}

build/android/envsetup.sh

@@ -49,14 +49,7 @@ android_envsetup_main() {
   # Add Chromium Android development scripts to system path.
   # Must be after CHROME_SRC is set.
   export PATH=$PATH:${CHROME_SRC}/build/android
-
-  export ENVSETUP_GYP_CHROME_SRC=${CHROME_SRC}  # TODO(thakis): Remove.
 }
 # In zsh, $0 is the name of the file being sourced.
 android_envsetup_main "${BASH_SOURCE:-$0}"
 unset -f android_envsetup_main
-
-android_gyp() {
-  echo "Please call build/gyp_chromium instead. android_gyp is going away."
-  "${ENVSETUP_GYP_CHROME_SRC}/build/gyp_chromium" --depth="${ENVSETUP_GYP_CHROME_SRC}" --check "$@"
-}