Remove the play services version check

An specific version of the library is now pulled in
via deps hooks, checking the version here is now
unnecessary.

BUG=541727

Change-Id: I21021393f06578d38ed8d7521a90520d74777d85
Reviewed-on: https://chromium-review.googlesource.com/309341
Reviewed-by: Aurimas Liutikas <aurimas@chromium.org>
Tested-by: Aurimas Liutikas <aurimas@chromium.org>