headers/crt: Remove builtin crc32 function declaration.

Because g++ shows those declarations as redundant.
Revert of 7ae84a6139579752bf678c070763c01b673b4120

Signed-off-by: Biswapriyo Nath <nathbappai@gmail.com>
Reference: https://sourceforge.net/p/mingw-w64/mailman/message/37232282/
Signed-off-by: Liu Hao <lh_mouse@126.com>
1 file changed