Removed comment on reproducibility issue #89911

Removed comment about reproducibility failures with crate type `bin` and `-Cdebuginfo=2` on non windows machines 
issue #89911

Author: paradoxicalguy

tests/run-make/reproducible-build/rmake.rs

@@ -199,10 +199,6 @@ fn diff_dir_test(crate_type: CrateType, remap_type: RemapType) {
                     .arg(format!("--remap-path-prefix={}=/b", base_dir.join("test").display()));
             }
             RemapType::Cwd { is_empty } => {
-                // FIXME(Oneirical): Building with crate type set to `bin` AND having -Cdebuginfo=2
-                // (or `-g`, the shorthand form) enabled will cause reproducibility failures
-                // for multiple platforms.
-                // See https://github.com/rust-lang/rust/issues/89911
                 // FIXME(#129117): Windows rlib + `-Cdebuginfo=2` + `-Z remap-cwd-prefix=.` seems
                 // to be unreproducible.
                 if !is_windows() {