Removing unused attributes from test_run.py

There is no use of "whitelist_file" and "blacklist_file"
attributes in "_build_regex" method of run.py
These are extra lines in the code of test_run.py
for "whitelist_file" and "blacklist_file".

These attributes were used earlier in "_build_regex" but removed after
I6f5fa7796c576b71c4a0dde66896974a8039a848
But it was missed to remove from test_run.py

This patch will remove the extra lines of code.

Change-Id: I13679de1e8e12bf4c512a76c5dc5058525efda9a
1 file changed