fix automatic 'deck:current' missing trailing space

3aeb5d8 accidentally added some duplicate code that made the search
parser run twice and strip the space from the search that had just been
automatically placed in the box.

aqt/browser.py

@@ -513,9 +513,6 @@ class Browser(QMainWindow):
                      self.onSearch)
         self.form.searchEdit.setCompleter(None)
         self.form.searchEdit.addItems(self.mw.pm.profile['searchHistory'])
-        self.connect(self.form.searchEdit.lineEdit(),
-                     SIGNAL("returnPressed()"),
-                     self.onSearch)
 
     def onSearch(self, reset=True):
         "Careful: if reset is true, the current note is saved."