remove unused locals/members/test functions

pkg/analyzer/lib/src/generated/constant.dart

 // Copyright (c) 2014, 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 analyzer.src.generated.constant;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
@@ skipping 1312 matching lines @@
             treatFinalInstanceVarAsConst &&
                 element is FieldElement &&
                 node.isFinal &&
                 !element.isStatic)) {
       if (node.element != null) {
         constantsToCompute.add(node.element);
       }
     }
     return null;
   }
-
-  AnalysisContext _getOwningContext() {
-    if (context is InternalAnalysisContext) {
-      InternalAnalysisContext internalContext = context;
-      return internalContext.getContextFor(librarySource);
-    }
-    return context;
-  }
 }
 
 /**
  * An object used to compute the values of constant variables and constant
  * constructor invocations in one or more compilation units. The expected usage
  * pattern is for the compilation units to be added to this computer using the
  * method [add] and then for the method [computeValues] to be invoked exactly
  * once. Any use of an instance after invoking the method [computeValues] will
  * result in unpredictable behavior.
  */
@@ skipping 4075 matching lines @@
       return BoolState.from(_element == rightElement);
     } else if (rightOperand is DynamicState) {
       return BoolState.UNKNOWN_VALUE;
     }
     return BoolState.FALSE_STATE;
   }
 
   @override
   String toString() => _element == null ? "-unknown-" : _element.name;
 }