Clean up test

Remove unused import; drop unused util methods and needless casts.

Author: smowton

java/ql/test/library-tests/frameworks/spring/util/Test.java

@@ -45,15 +45,13 @@
 // Test case generated by GenerateFlowTestCase.ql
 public class Test {
 
-	Object getArrayElement(Object container) { return ((Object[])container)[0]; }
+	Object getArrayElement(Object[] container) { return container[0]; }
 	Object getElement(Collection container) { return container.iterator().next(); }
 	Object getElement(Iterator container) { return container.next(); }
 	Object getMapKey(Map container) { return container.keySet().iterator().next(); }
 	Object getMapValue(Map container) { return container.get(null); }
 	Object[] newWithArrayElement(Object element) { return new Object[] {element}; }
-	// Object newWithMapKey(Object element) { return null; }
   Properties newPropertiesWithMapKey(Object element) { Properties p = new Properties(); p.put(element, null); return p; }
-	// Object newWithMapValue(Object element) { return null; }
   Properties newPropertiesWithMapValue(Object element) { Properties p = new Properties(); p.put(null, element); return p; }
 	static Object source() { return null; }
 	static void sink(Object o) { }

java/ql/test/library-tests/frameworks/spring/util/test.ql

@@ -1,6 +1,5 @@
 import java
 import semmle.code.java.dataflow.DataFlow
-import semmle.code.java.dataflow.ExternalFlow
 import semmle.code.java.dataflow.TaintTracking
 import TestUtilities.InlineExpectationsTest