Clean up many generated constructors

pkg/analysis_server/lib/src/services/generated/util.dart

Index: pkg/analysis_server/lib/src/services/generated/util.dart
diff --git a/pkg/analysis_server/lib/src/services/generated/util.dart b/pkg/analysis_server/lib/src/services/generated/util.dart
index 06502579c299c83eda035ceb33f289926ab8a487..31a15c3025e5ef441b18dcfca89e3be66d7f1d8e 100644
--- a/pkg/analysis_server/lib/src/services/generated/util.dart
+++ b/pkg/analysis_server/lib/src/services/generated/util.dart
@@ -83,8 +83,7 @@ class AssistContext {
    */
   AstNode get coveredNode {
     if (_coveredNode == null) {
-      NodeLocator locator =
-          new NodeLocator.con2(selectionOffset, selectionOffset);
+      NodeLocator locator = new NodeLocator(selectionOffset, selectionOffset);
       _coveredNode = locator.searchWithin(compilationUnit);
     }
     return _coveredNode;
@@ -95,8 +94,8 @@ class AssistContext {
    */
   AstNode get coveringNode {
     if (_coveringNode == null) {
-      NodeLocator locator = new NodeLocator.con2(
-          selectionOffset, selectionOffset + selectionLength);
+      NodeLocator locator =
+          new NodeLocator(selectionOffset, selectionOffset + selectionLength);
       _coveringNode = locator.searchWithin(compilationUnit);
     }
     return _coveringNode;
@@ -935,8 +934,7 @@ class CorrectionUtils {
   /**
    * @return the [AstNode] that encloses the given offset.
    */
-  AstNode findNode(int offset) =>
-      new NodeLocator.con1(offset).searchWithin(unit);
+  AstNode findNode(int offset) => new NodeLocator(offset).searchWithin(unit);
 
   /**
    * TODO(scheglov) replace with nodes once there will be [CompilationUnit.comments].