remove hack from error fixed by compact handle adjusting

Author: Vrixyz

naga/src/valid/handles.rs

@@ -291,10 +291,6 @@ impl super::Validator {
                                 source: TypeError::InvalidData(comment_struct_member_doc.0 .0),
                             })?;
                     }
-                    crate::TypeInner::Scalar(_) => {
-                        // TODO: debug why this can happen, if we systematically add all couples "Type/index" for struct members.
-                        // This has been mitigated by not adding them when there is no comments, but it's probably not enough.
-                    }
                     _ => {
                         // TODO: internal error ? We should never get here.
                         return Err(ValidationError::Type {