[SOGo] Remove old js file

data/conf/sogo/sogo.conf

@@ -14,7 +14,7 @@
     SOGoEnableEMailAlarms = YES;
     SOGoFoldersSendEMailNotifications = YES;
     SOGoForwardEnabled = YES;
-    SOGoUIAdditionalJSFiles = (js/theme-blue.js, js/custom-sogo.js);
+    SOGoUIAdditionalJSFiles = (js/custom-sogo.js);
 
     // Multi-domain setup
     // Domains are isolated, you can define visibility options here.