[Improve] Remove useless EfficientnetV2 config files. (#1300)

* update model file

* Delete xcit.py

* Delete efficientnet_v2_b0.py

* Delete efficientnet_v2_b1.py

* Delete efficientnet_v2_b2.py

* Delete efficientnet_v2_b3.py

* Delete efficientnet_v2_l.py

* Delete efficientnet_v2_m.py

* Delete efficientnet_v2_s.py

* Delete efficientnet_v2_xl.py

* Delete efficientnet_v2-b0_8xb32_in1k.py

* Delete efficientnet_v2-b1_8xb32_in1k.py

* Delete efficientnet_v2-b2_8xb32_in1k.py

* Delete efficientnet_v2-b3_8xb32_in1k.py

* Delete efficientnet_v2-l_8xb32_in1k.py

* Delete efficientnet_v2-l_8xb32_in21ft1k.py

* Delete efficientnet_v2-m_8xb32_in1k.py

* Delete efficientnet_v2-m_8xb32_in21ft1k.py

* Delete efficientnet_v2-s_8xb32_in1k.py

* Delete efficientnet_v2-s_8xb32_in21ft1k.py

* Delete efficientnet_v2-xl_8xb32_in21ft1k.py

Co-authored-by: qingtian <[email protected]>

Author: qingtian5