move diagnostics.rs into parser/

src/libsyntax/parse/parser/module.rs

@@ -1,11 +1,11 @@
 use super::{Parser, PResult};
 use super::item::ItemInfo;
+use super::diagnostics::Error;
 
 use crate::attr;
 use crate::ast::{self, Ident, Attribute, ItemKind, Mod, Crate};
 use crate::parse::{new_sub_parser_from_file, DirectoryOwnership};
 use crate::parse::token::{self, TokenKind};
-use crate::parse::diagnostics::{Error};
 use crate::source_map::{SourceMap, Span, DUMMY_SP, FileName};
 use crate::symbol::sym;