Revert of [Telemetry] Pass test_runner environment in local args instead of a global variable

tools/telemetry/telemetry/unittest_util/run_tests.py

Index: tools/telemetry/telemetry/unittest_util/run_tests.py
diff --git a/tools/telemetry/telemetry/unittest_util/run_tests.py b/tools/telemetry/telemetry/unittest_util/run_tests.py
index 8539e5d341ea5ce7f753d592d421ef2778268899..0d44f218d42d917434d352ee6e9513edfa8de9c9 100644
--- a/tools/telemetry/telemetry/unittest_util/run_tests.py
+++ b/tools/telemetry/telemetry/unittest_util/run_tests.py
@@ -35,7 +35,7 @@
     return parser
 
   @classmethod
-  def AddCommandLineArgs(cls, parser, _):
+  def AddCommandLineArgs(cls, parser):
     parser.add_option('--repeat-count', type='int', default=1,
                       help='Repeats each a provided number of times.')
     parser.add_option('-d', '--also-run-disabled-tests',
@@ -55,7 +55,7 @@
                                         reporting=True)
 
   @classmethod
-  def ProcessCommandLineArgs(cls, parser, args, _):
+  def ProcessCommandLineArgs(cls, parser, args):
     # We retry failures by default unless we're running a list of tests
     # explicitly.
     if not args.retry_limit and not args.positional_args:
@@ -75,10 +75,10 @@
   def main(cls, args=None, stream=None):  # pylint: disable=W0221
     # We override the superclass so that we can hook in the 'stream' arg.
     parser = cls.CreateParser()
-    cls.AddCommandLineArgs(parser, None)
+    cls.AddCommandLineArgs(parser)
     options, positional_args = parser.parse_args(args)
     options.positional_args = positional_args
-    cls.ProcessCommandLineArgs(parser, options, None)
+    cls.ProcessCommandLineArgs(parser, options)
 
     obj = cls()
     if stream is not None: