codereview: remove unused upload_options.revision

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/60640052

lib/codereview/codereview.py

@@ -2656,7 +2656,6 @@ def RietveldSetup(ui, repo):
 	upload_options.message = None
 	upload_options.issue = None
 	upload_options.download_base = False
-	upload_options.revision = None
 	upload_options.send_mail = False
 	upload_options.vcs = None
 	upload_options.server = server
@@ -3435,9 +3434,6 @@ class MercurialVCS(VersionControlSystem):
 		cwd = os.path.normpath(os.getcwd())
 		assert cwd.startswith(self.repo_dir)
 		self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
-		if self.options.revision:
-			self.base_rev = self.options.revision
-		else:
 		mqparent, err = RunShellWithReturnCode(['hg', 'log', '--rev', 'qparent', '--template={node}'])
 		if not err and mqparent != "":
 			self.base_rev = mqparent
@@ -3447,6 +3443,7 @@ class MercurialVCS(VersionControlSystem):
 				# No revisions; use 0 to mean a repository with nothing.
 				out = "0:0"
 			self.base_rev = out.split(':')[1].strip()
+
 	def _GetRelPath(self, filename):
 		"""Get relative path of a file according to the current directory,
 		given its logical path in the repo."""