Remove workaround for missing setter function returns (dartbug.com/15914).

pkg/analyzer/test/services/data/cu_tests.data

Index: pkg/analyzer/test/services/data/cu_tests.data
===================================================================
--- pkg/analyzer/test/services/data/cu_tests.data	(revision 32086)
+++ pkg/analyzer/test/services/data/cu_tests.data	(working copy)
@@ -139,16 +139,6 @@
   int x() => null;
 }
 >>>
-Object get _globalState => null;
-
-set _globalState(Object val) {
-}
-<<<
-Object get _globalState => null;
-
-set _globalState(Object val) {
-}
->>>
 var x = #foo;
 var y=#foo.bar.baz;
 <<<
@@ -180,4 +170,20 @@
 >>> dartbug.com/15912
 abstract class ListBase<E> = Object with ListMixin<E>;
 <<<
-abstract class ListBase<E> = Object with ListMixin<E>;
+abstract class ListBase<E> = Object with ListMixin<E>;
+>>> dartbug.com/15914
+Object get _globalState => null;
+
+set _globalState(Object val) {
+}
+
+void setX(x) {
+}
+<<<
+Object get _globalState => null;
+
+set _globalState(Object val) {
+}
+
+void setX(x) {
+}