scanner: remove debug_tokens (#8078)

vlib/v/scanner/scanner.v

@@ -28,7 +28,6 @@ pub mut:
 	is_inter_start    bool // for hacky string interpolation TODO simplify
 	is_inter_end      bool
 	is_enclosed_inter bool
-	is_debug          bool
 	line_comment      string
 	// prev_tok                 TokenKind
 	is_started                  bool
@@ -1175,29 +1174,6 @@ fn (s &Scanner) expect(want string, start_pos int) bool {
 	return true
 }
 
-fn (mut s Scanner) debug_tokens() {
-	s.pos = 0
-	s.is_started = false
-	s.is_debug = true
-	fname := s.file_path.all_after_last(os.path_separator)
-	println('\n===DEBUG TOKENS $fname===')
-	for {
-		tok := s.scan()
-		tok_kind := tok.kind
-		lit := tok.lit
-		print(tok_kind.str())
-		if lit != '' {
-			println(' `$lit`')
-		} else {
-			println('')
-		}
-		if tok_kind == .eof {
-			println('============ END OF DEBUG TOKENS ==================')
-			break
-		}
-	}
-}
-
 [inline]
 fn (mut s Scanner) ignore_line() {
 	s.eat_to_end_of_line()