Remove optional --commit-author argument from auto-rebaseline script.

third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
index 5d5f8ee020d260415b6fb8a92d2fba2d395b4830..0cdf0cefa977de0fb19ad29ce5fd50319fc3ca4e 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
@@ -265,12 +265,10 @@ class Git(SCM):
             raise ScriptError(message="Can't find a branch to diff against. %s does not exist" % remote_master_ref)
         return remote_master_ref
 
-    def commit_locally_with_message(self, message, commit_all_working_directory_changes=True, author=None):
+    def commit_locally_with_message(self, message, commit_all_working_directory_changes=True):
         command = ['commit', '-F', '-']
         if commit_all_working_directory_changes:
             command.insert(1, '--all')
-        if author:
-            command.insert(1, "--author='%s'" % (author))
         self._run_git(command, input=message)
 
     # These methods are git specific and are meant to provide support for the Git oriented workflow