Revert "std.Io.Reader: work around llvm backend bug"

This reverts commit 530cc2c1111699d9d02ad9ebef94efa6b99f5205.

The compiler bug has been fixed.
e2fdaea0b3Andrew Kelley committed on 8/30/2025, 1:04:25 PMparent558bea2
1 file changedLine totals unavailable