fix(generator): remove obsolete ez_setup bootstrap code (#32335)

Author: whowes

generator/ez_setup.py

@@ -14,9 +14,6 @@
 #  limitations under the License.
 """Setup script for Google APIs Client Generator."""
 
-from ez_setup import use_setuptools
-use_setuptools()
-
 from setuptools import find_packages  # pylint:disable=g-import-not-at-top
 from setuptools import setup