Miao Zheng d88f393ffa
[Fix] Remove dependcy mmdet when do not use MaskFormerHead and MMDET_Mask2FormerHead (#2448)
## Motivation

Calling `mmseg.utils.register_all_modules` will import `MaskFormerHead`
and `Mask2FormerHead`, it will crash if mmdet is not installed as `None`
cannot be initialized.

## Modification

- Modify `MMDET_MaskFormerHead=BaseModule` and `MMDET_Mask2FormerHead =
BaseModule` when cannot import from mmdet
2022-12-31 01:02:58 +08:00
..
2022-11-22 22:42:11 +08:00