🚒 Fixed double copy of the set_branch() argument parsing method

* most likely to be a stale copy from a former merge.

Author: guyzmo

git_repo/repo.py

@@ -242,14 +242,6 @@ def set_repo_slug(self, repo_slug):
             self.user_name = None
             self.repo_name = self.repo_slug
 
-    @store_parameter('<branch>')
-    def set_branch(self, branch):
-        # FIXME workaround for default value that is not correctly parsed in docopt
-        if branch == None:
-            branch = 'master'
-
-        self.branch = branch
-
     @store_parameter('<branch>')
     @store_parameter('--branch')
     def set_branch(self, branch):