change name test_lexer.py + dead code

Author: ksfi

Lib/test/test_tools/test_lexer_to_text.py renamed to Lib/test/test_tools/test_lexer.py

@@ -366,7 +366,4 @@ def to_text(tkns: list[Token], dedent: int = 0) -> str:
         src = open(filename).read()
 
     dedent = int(sys.argv[3])
-    print(to_text(tokenize(src), dedent))
-
-    # for tkn in tokenize(src, filename=filename):
-    #     print(tkn)
+    print(to_text(tokenize(src), dedent))