code: def delete(self, item):
          
          indexer = self.items.get_loc(item)
  
          is_deleted = np.zeros(self.shape[0], dtype=np.bool_)
          is_deleted[indexer] = True
          ref_loc_offset = -is_deleted.cumsum()
  
          is_blk_deleted = [False] * len(self.blocks)
  
          if isinstance(indexer, int):
              affected_start = indexer
          else:
              affected_start = is_deleted.nonzero()[0][0]
  
          for blkno, _ in _fast_count_smallints(self._blknos[affected_start:]):
              blk = self.blocks[blkno]
              bml = blk.mgr_locs
              blk_del = is_deleted[bml.indexer].nonzero()[0]
  
              if len(blk_del) == len(bml):
                  is_blk_deleted[blkno] = True
                  continue
              elif len(blk_del) != 0:
                  blk.delete(blk_del)
                  bml = blk.mgr_locs
  
              blk.mgr_locs = bml.add(ref_loc_offset[bml.indexer])
  
          # FIXME: use Index.delete as soon as it uses fastpath=True
          self.axes[0] = self.items[~is_deleted]
          self.blocks = tuple(b for blkno, b in enumerate(self.blocks)
                              if not is_blk_deleted[blkno])
          self._shape = None
          self._rebuild_blknos_and_blklocs()
docs: Delete selected item (items if non-unique) in-place.