templater: don't search randomly for templates - trust util.datapath

The search was introduced in 2653740d8118. It might have been necessary back
then when using __file__ directly and frozen-ness wasn't considered. Now we
should know exactly where the templates can be found.

mercurial/templater.py

@@ -711,7 +711,7 b' class templater(object):'
 
 def templatepaths():
     '''return locations used for template files.'''
-    pathsrel = ['templates', '../templates']
+    pathsrel = ['templates']
     paths = [os.path.normpath(os.path.join(util.datapath, f))
              for f in pathsrel]
     return [p for p in paths if os.path.isdir(p)]