Remove service-compiler related code.

tools/immic/lib/src/importer.dart

-// Copyright (c) 2015, the Dartino project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE.md file.
-
-import 'dart:io';
-import 'dart:convert';
-
-import 'parser.dart';
-import 'primitives.dart' as primitives;
-import 'struct_layout.dart';
-
-import 'package:path/path.dart' show join, dirname;
-
-Future<Map> parseImports(Unit unit, ImportResolver resolver, context) async {
-  Map units = {};
-  await ImportParser.parse(unit, resolver, context, units);
-  return units;
-}
-
-abstract class ImportResolver<Context> {
-  Context resolve(Import import, Context context);
-  Future<String> read(Context context);
-}
-
-class ImportParser<Context> extends Visitor {
-  final ImportResolver resolver;
-  final Context context;
-  final Map<Context, Unit> units;
-
-  static parse(Unit unit, ImportResolver resolver, Context context, Map units) {
-    var parser = new ImportParser(resolver, context, units);
-    return parser.visitUnit(unit);
-  }
-
-  ImportParser(this.resolver, this.context, this.units);
-
-  visitUnit(Unit unit) async {
-    units[context] = unit;
-    for (var import in unit.imports) {
-      await visitImport(import);
-    }
-  }
-
-  visitImport(Import import) async {
-    var newContext = resolver.resolve(import, context);
-    if (newContext != null) {
-      String input = await resolver.read(newContext);
-      Unit unit = parseUnit(input);
-      await parse(unit, resolver, newContext, units);
-    }
-  }
-}