Revert "Temporary fix for build bots: Set verbose always true"

This reverts commit 8858eac1d5869d95b1234c9bb5e32f25c25418a4.

Reason for revert: It was a temporary fix to get the build bots(go/ab).

Change-Id: I27321b69cfcf6f39c01276639c2bb5711469ed5a
diff --git a/test/testrunner/testrunner.py b/test/testrunner/testrunner.py
index 601acb6..f48bf76 100755
--- a/test/testrunner/testrunner.py
+++ b/test/testrunner/testrunner.py
@@ -812,10 +812,8 @@
   return test
 
 def main():
-  global verbose
   gather_test_info()
   user_requested_test = parse_option()
-  verbose = True
   setup_test_env()
   if build:
     build_targets = ''