remove unnecessary includes inside hanekawa

hanekawa/math/abs.c

@@ -16,8 +16,6 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-#include <hal.h>
- 
 int abs(int x) {
 	return x >= 0 ? x : -x;
 }

hanekawa/string/stpcpy.c

@@ -16,10 +16,6 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#include <string.h>
-#include <stdint.h>
-#include <limits.h>
-
 char* stpcpy(char* restrict d, const char* s){
     for(;(*d=*s); s++, d++);
     return d;

hanekawa/string/strcpy.c

@@ -16,8 +16,6 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#include <string.h>
-
 char* strcpy(char* restrict dest, const char* src) {
     stpcpy(dest, src);
     return dest;