Rename *note_without_error as *note.

Because the variant name in `Level` is `Note`, and the `without_error`
suffix is omitted in similar cases like `struct_allow` and
`struct_help`.

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -1870,7 +1870,7 @@ impl SharedEmitterMain {
                     let mut err = match level {
                         Level::Error { lint: false } => sess.struct_err(msg).forget_guarantee(),
                         Level::Warning(_) => sess.struct_warn(msg),
-                        Level::Note => sess.struct_note_without_error(msg),
+                        Level::Note => sess.struct_note(msg),
                         _ => bug!("Invalid inline asm diagnostic level"),
                     };