Fix byte compilation warning

gerrit.el:864:19: Warning: in defface for ‘gerrit-section’: Value for face
    attribute ‘:inherit’ should not be quoted

Change-Id: I4f1747d8883b1cc0ffab467efe462d7343b624c9

Author: twmr

gerrit.el

@@ -861,7 +861,7 @@ shown in the section buffer."
   :group 'faces)
 
 (defface gerrit-section
-  '((t (:inherit 'magit-section-heading)))
+  '((t (:inherit magit-section-heading)))
   "Used for the section names in the dashboard."
   :group 'faces)