fixes brave/brave-browser#17809 Related Chromium change https://source.chromium.org/chromium/chromium/src/+/0470f485e51e6ebb07cb96a64fd077fb3e5ff9ee : build: remove is_python2.py _is_python2 is always false now. Bug: 1112471 Change-Id: I049610e59c7f51472b6326a7fcdd82c732725cec