Revert "Use names of accessors instead of their entire spans."

This reverts commit 2195798.

Author: DanielRosenwasser

src/compiler/utilities.ts

@@ -387,8 +387,6 @@ namespace ts {
             case SyntaxKind.FunctionDeclaration:
             case SyntaxKind.FunctionExpression:
             case SyntaxKind.MethodDeclaration:
-            case SyntaxKind.GetAccessor:
-            case SyntaxKind.SetAccessor:
             case SyntaxKind.TypeAliasDeclaration:
                 errorNode = (<Declaration>node).name;
                 break;