mark isInnerClass() as deprecated

git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@3000 f5eafffb-2e1d-0410-98e4-8ec43c5233c4

com.ibm.wala.core/src/com/ibm/wala/ipa/cha/ClassHierarchy.java

@@ -1266,6 +1266,7 @@ public class ClassHierarchy implements IClassHierarchy {
   /**
    * Does it look like an inner class? [TODO: is this definitive?]
    */
+  @Deprecated
   public static boolean isInnerClass(IClass klass) throws NullPointerException {
     return klass.getName().toString().indexOf("$") > -1;
   }