Yuki Okushi 46f9253098
Rollup merge of #82439 - ssomers:btree_fix_unsafety, r=Mark-Simulacrum
BTree: fix untrue safety

Fix needless and missing `unsafe` tags.

r? ````@Mark-Simulacrum````
2021-03-03 16:27:39 +09:00
..
2021-01-07 16:16:36 +09:00