Revert a bunch of python3_8 additions.

Revert a bunch of python3_8 additions.

More dependencies need to be updated before these are ready.

Revert "dev-python/netaddr: add python3_8"

This reverts commit 1b8ad93db83c5a9e328ee11c845688d1270cc5bd.

Revert "dev-python/drf-yasg: add python 3.8"

This reverts commit e0db6ff1fdefa10e49e97d2bfd4f016cc956f342.

Revert "dev-python/djangorestframework: add python3_8 to 3.10.3"

This reverts commit e28a73813f75967fab930fab384e5729eef8f7ce.

Revert "dev-python/django-auth-ldap: add python3_8"

This reverts commit fa4c9da309afe6ea47280c88347236cd1dfddfe5.

Revert "dev-python/django-cachops: add python 3.8"

This reverts commit bde7ce3d8ec7d6a2137540b866a2cced08f28fd6.

Revert "django-cors-headers: add python3_8"

This reverts commit 6e59af278bbf64a9e0f0dbcfb46d39c621a496cf.

Revert "dev-python/django-debug-toolbar: add python3_8"

This reverts commit 229d75f50ad73bd12120901b1ea9a91ee4e28f41.

Revert "dev-python/django-filter: add python3_8"

This reverts commit 70210a8778ff68550c5615f8ea402a2ce8469a63.

Revert "dev-python/django-mptt: add python3_8"

This reverts commit 99f39a77105b9bfa89fe05664fce0c7ac4eacc0a.

Revert "dev-python/django: add python3_8"

This reverts commit 11f1441e965e3cd849d45cf2386208e8808baaa6.

Signed-off-by: Matt Turner <mattst88@gentoo.org>