wxGUI: remove extra print statement (merge https://trac.osgeo.org/grass/changeset/67636 from trunk)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@67637 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/lmgr/frame.py

@@ -2260,7 +2260,6 @@ class GMFrame(wx.Frame):
         """Quit GRASS terminal"""
         try:
             shellPid = int(grass.gisenv()['PID'])
-            print >> sys.stderr, grass.gisenv()
         except:
             grass.warning(_("Unable to exit GRASS shell: unknown PID"))
             return