Revert "std.mem: work around LoongArch inline asm bug in doNotOptimizeAway()"

This reverts commit e7f1624e6ea11bb30c779963f9fdfabd51902276.

The bug was fixed in LLVM 22.
449d33bf17Alex Rønne Petersen committed on 2/19/2026, 6:14:07 PMparentd6dd695
1 file changedLine totals unavailable