Java: remove mention of abstract classes from qhelp

Author: Jami Cogswell

java/ql/src/Likely Bugs/Frameworks/JUnit/JUnit5MissingNestedAnnotation.md

@@ -37,7 +37,7 @@ public class IntegerOperationTest {
 
 ## Implementation Notes
 
-This rule is focused on missing `@Nested` annotations on non-static nested (inner) test classes. Static nested test classes and abstract nested test classes should not be annotated with `@Nested`. As a result, the absence of a `@Nested` annotation on such classes is compliant. Identifying incorrect application of a `@Nested` annotation to static and abstract classes is out of scope for this rule.
+This rule is focused on missing `@Nested` annotations on non-static nested (inner) test classes. Static nested test classes should not be annotated with `@Nested`. As a result, the absence of a `@Nested` annotation on such classes is compliant. Identifying incorrect application of a `@Nested` annotation to static nested classes is out of scope for this rule.
 
 ## References
 

java/ql/test/query-tests/Likely Bugs/Frameworks/JUnit/AnnotationTest.java

@@ -87,29 +87,20 @@ public void test() {
     }
   }
 
-  // COMPLIANT: Invalid to use `@Nested` on an abstract class, but
-  // this matter is out of scope (see QHelp Implementation Notes)
-  @Nested
-  public abstract class Test8 {
-    @Test
-    public void test() {
-    }
-  }
-
-  interface Test9 {
+  interface Test8 {
   }
 
   public void f() {
     // COMPLIANT: anonymous classes are not considered as inner test
     // classes by JUnit and therefore don't need `@Nested`
-    new Test9() {
+    new Test8() {
       @Test
       public void test() {
       }
     };
     // COMPLIANT: local classes are not considered as inner test
     // classes by JUnit and therefore don't need `@Nested`
-    class Test10 {
+    class Test9 {
       @Test
       void test() {
       }
@@ -118,7 +109,7 @@ void test() {
 
   // COMPLIANT: private classes are not considered as inner test
   // classes by JUnit and therefore don't need `@Nested`
-  private class Test11 {
+  private class Test10 {
     @Test
     public void test() {
     }