Remove allowing extra 2 lines since prepend_if_ee

Since we can just use `prepend_if_ee` now we shouldn't allow any
difference. We should just add them to CE.

scripts/ee-specific-lines-check

@@ -15,15 +15,7 @@ offenses = updated_numstat.select do |file, updated_delta|
 
   more_lines = updated_delta > current_delta
 
-  allow_prepend_line =
-    # Don't complain if we're just adding 1 or 2 more lines, which could be
-    # `prepend EE::Module` and a blank line that we want.
-    !(current_delta == 0 && updated_delta <= 2) ||
-    # We only allow Ruby files to have prepend line
-    !file.end_with?('.rb')
-
   more_lines &&
-    allow_prepend_line &&
     !WHITELIST.any? { |pattern| Dir.glob(pattern, File::FNM_DOTMATCH).include?(file) }
 end