Merge #3287

3287: Omit type hints for enum variant bind pats r=matklad a=SomeoneToIgnore

After using new hints for a while, I've started to think that hints for enum variants are an overkill.
Another user also shares the same toughts: #3273 (comment)

Co-authored-by: Kirill Bulatov <[email protected]>

Author: bors[bot]