slapos.grid.SlapObject: Get rid noisy and pointless comment.

Comment duplicates the url. It is available 3 lines below, thank you very
much.
Comment assumes resulting file is actually intended for viewer to edit it,
which is wrong.

So just leave the comment out altogether, as it does not bring any value.
Also, allows simplifying code.

slapos/grid/SlapObject.py

@@ -36,7 +36,6 @@ import stat
 import subprocess
 import tarfile
 import tempfile
-import textwrap
 import time
 import xmlrpclib
 
@@ -273,14 +272,7 @@ class Software(object):
 
   def _create_buildout_profile(self, buildout_cfg, url):
     with open(buildout_cfg, 'wb') as fout:
-      fout.write(textwrap.dedent("""\
-          # Created by slapgrid. extends {url}
-          # but you can change it for development purposes.
-
-          [buildout]
-          extends =
-            {url}
-          """.format(url=url)))
+      fout.write('[buildout]\nextends = ' + url + '\n')
     self._set_ownership(buildout_cfg)
 
   def uploadSoftwareRelease(self, tarpath):