If you don't want the "lightbulb" icon to appear in the editor to indicate a particular fix, open the list of available actions by pressing &shortcut:ShowIntentionActions; and toggle the lightbulb icon near the text of the action into inactive state by clicking it with the mouse.
There will be no lightbulb shown for this particular action but you will be still able to use it with the &shortcut:ShowIntentionActions; shortcut.