Remove package imports from itself.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

 // Copyright (c) 2016, the Dart 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 file.
 
 library fasta.body_builder;
 
-import 'package:front_end/src/fasta/parser/parser.dart'
-    show FormalParameterType, optional;
+import '../parser/parser.dart' show FormalParameterType, optional;
 
-import 'package:front_end/src/fasta/parser/error_kind.dart' show ErrorKind;
+import '../parser/error_kind.dart' show ErrorKind;
 
-import 'package:front_end/src/fasta/parser/identifier_context.dart'
-    show IdentifierContext;
+import '../parser/identifier_context.dart' show IdentifierContext;
 
 import 'package:kernel/ast.dart';
 
 import 'package:kernel/clone.dart' show CloneVisitor;
 
 import 'package:kernel/transformations/flags.dart' show TransformerFlag;
 
 import 'package:kernel/class_hierarchy.dart' show ClassHierarchy;
 
 import 'package:kernel/core_types.dart' show CoreTypes;
 
 import '../parser/dart_vm_native.dart' show skipNativeClause;
 
-import 'package:front_end/src/fasta/scanner/token.dart'
+import '../scanner/token.dart'
     show BeginGroupToken, Token, isBinaryOperator, isMinusOperator;
 
 import '../errors.dart' show internalError, printUnexpected;
 
 import '../source/scope_listener.dart'
     show JumpTargetKind, NullValue, ScopeListener;
 
 import '../builder/scope.dart' show AccessErrorBuilder, AmbiguousBuilder, Scope;
 
 import '../source/outline_builder.dart' show asyncMarkerFromTokens;
@@ skipping 2634 matching lines @@
   } else if (node is TypeDeclarationBuilder) {
     return node.name;
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisPropertyAccessor) {
     return node.name.name;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }