Remove added test

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/bestpractices/xml/UnusedPrivateMethod.xml

@@ -2296,21 +2296,4 @@ public class ObtainViaTest {
             }
             ]]></code>
     </test-code>
-
-    <test-code>
-        <description>UnusedPrivateMethod #5083 - method reference without target type (3)</description>
-        <expected-problems>2</expected-problems>
-        <code><![CDATA[
-import java.util.Set;
-
-public class Foo {
-    private void foo(AnotherUnresolvedType baz) {}
-    private void foo(UnresolvedType baz) {}
-    public void bar(Set<SomeOtherUnresolvedType> s) {
-        s.forEach(this::foo);  // Not being able to resolve UnresolvedType and AnotherUnresolvedType means we can't tell which foo is being used here…
-    }
-}
-            ]]></code>
-    </test-code>
-
 </test-data>