remove unnecessary sepator in file menu (main.ui)

src/yuzu/main.ui

@@ -55,7 +55,6 @@
     <addaction name="separator"/>
     <addaction name="menu_recent_files"/>
     <addaction name="separator"/>
-    <addaction name="separator"/>
     <addaction name="action_Load_Amiibo"/>
     <addaction name="separator"/>
     <addaction name="action_Open_yuzu_Folder"/>