Fix incorrect import in a test.

This was missed due to unused import removal in GWT.

Change-Id: I699b5a1130f9da17ec51c854272078d32ad5312f

dev/core/test/com/google/gwt/dev/jjs/impl/JsInteropRestrictionCheckerTest.java

diff --git a/dev/core/test/com/google/gwt/dev/jjs/impl/JsInteropRestrictionCheckerTest.java b/dev/core/test/com/google/gwt/dev/jjs/impl/JsInteropRestrictionCheckerTest.java
index 319c7e2..333153d 100644
--- a/dev/core/test/com/google/gwt/dev/jjs/impl/JsInteropRestrictionCheckerTest.java
+++ b/dev/core/test/com/google/gwt/dev/jjs/impl/JsInteropRestrictionCheckerTest.java
@@ -1905,7 +1905,6 @@
   }
 
   public void testUsableByJsTypesSucceeds() throws Exception {
-    addSnippetImport("jsinterop.annotations.JsExport");
     addSnippetImport("jsinterop.annotations.JsType");
     addSnippetImport("jsinterop.annotations.JsFunction");
     addSnippetImport("com.google.gwt.core.client.JavaScriptObject");