放弃检查 shebang 行以确定文件是否受支持

nsamples sample% tottime (ms) cumul% cumtime (ms) filename:lineno(function) 2530/2530 10.8 50.600 10.8 50.600 :460(realpath) 2258/2258 9.6 45.160 9.6 45.160 init.py:970(Path.open) 1969/1969 8.4 39.380 8.4 39.380 :428(realpath) 1344/1344 5.7 26.880 5.7 26.880 init.py:1245(Path.unlink) 1325/1325 5.7 26.500 5.7 26.500 :382(abspath) 1165/1165 5.0 23.300 5.0 23.300 io.py:41(File._open) 777/3006 3.3 15.540 12.8 60.120 api.py:378(_file_output_stream_context) 637/637 2.7 12.740 2.7 12.740 place.py:58(_known_pattern) 614/614 2.6 12.280 2.6 12.280 :395(walk) 506/506 2.2 10.120 2.2 10.120 :396(walk) 442/442