perf: Revert accidental inclusion of a part of #69218#71996

Merged

bors merged 2 commits intorust-lang:masterfrom Marwes:detach_undo_log

May 27, 2020

+41-33

Commits on May 7, 2020

perf: Revert accidental inclusion of a part of rust-lang#69218
Markus Westerlind
committed

Commits on May 24, 2020

perf: Add inline on commonly used methods added in 69464
Markus Westerlind
committed