Remove redundant declaration in file.h

Not sure why it even is here

Author: Girgias

ext/standard/file.h

@@ -37,7 +37,6 @@ PHPAPI PHP_FUNCTION(fpassthru);
 PHP_MINIT_FUNCTION(user_streams);
 
 PHPAPI int php_le_stream_context(void);
-PHPAPI int php_set_sock_blocking(php_socket_t socketd, int block);
 PHPAPI int php_copy_file(const char *src, const char *dest);
 PHPAPI int php_copy_file_ex(const char *src, const char *dest, int src_chk);
 PHPAPI int php_copy_file_ctx(const char *src, const char *dest, int src_chk, php_stream_context *ctx);