Remove getopt_long() from headers

We removed this API a long time ago and it was breaking the GNU make
open source build.

third_party/make/README.cosmo

@@ -15,6 +15,7 @@ LICENSE
 
 LOCAL CHANGES
 
+  - Introduce $(uniq token...) native function
   - .INTERNET variable to allow internet access
   - .PLEDGE variable which restricts system calls
   - .UNVEIL variable which controls Landlock LSM

third_party/make/getopt.h

@@ -16,11 +16,9 @@ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 You should have received a copy of the GNU General Public License along with
 this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#include "third_party/getopt/getopt.h"
 /* clang-format off */
 
 #ifndef _GETOPT_H
-#if 0 && !defined(_GETOPT_H)
 #define _GETOPT_H 1
 
 #ifdef	__cplusplus
@@ -136,6 +134,5 @@ extern int _getopt_internal (int argc, char *const *argv,
 			     const char *shortopts,
 		             const struct option *longopts, int *longind,
 			     int long_only);
-#endif
 
 #endif /* getopt.h */