--- a/mercurial/wireprotoserver.py	Wed Jan 31 11:19:05 2018 -0800
+++ b/mercurial/wireprotoserver.py	Wed Jan 31 11:19:47 2018 -0800
@@ -282,9 +282,6 @@
                 data[arg] = val
         return [data[k] for k in keys]
 
-    def getarg(self, name):
-        return self.getargs(name)[0]
-
     def getfile(self, fpout):
         self.sendresponse('')
         count = int(self.fin.readline())