Remove code defined under USE_IM_CONTROL #ifdefs

This is not being used and should not be part of the core anyway.

src/nvim/getchar.c

@@ -2349,11 +2349,6 @@ static int vgetorpeek(int advance)
                                 + typebuf.tb_len] != NUL)
             typebuf.tb_noremap[typebuf.tb_off
                                + typebuf.tb_len++] = RM_YES;
-#ifdef USE_IM_CONTROL
-          /* Get IM status right after getting keys, not after the
-           * timeout for a mapping (focus may be lost by then). */
-          vgetc_im_active = im_get_status();
-#endif
         }
       }             /* for (;;) */
     }           /* if (!character from stuffbuf) */