Removes useless code checkout code for presubmit.
Removes useless code checkout code for presubmit.

Change-Id: If3f8f427d99cb68021e8f8116922b17b0ae33e66

cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp