remove unnecessary close, because fclose already closes the file descriptor

src/cfgparse.y

@@ -369,7 +369,6 @@ void parse_file(const char *f) {
         }
     }
     fclose(fstr);
-    close(fd);
 
     /* For every custom variable, see how often it occurs in the file and
      * how much extra bytes it requires when replaced. */