Remove redundant framebuffer disposal test

Author: toaster0123

jme3-core/src/test/java/com/jme3/renderer/opengl/GlRendererFrameBufferLifecycleTest.java

@@ -65,15 +65,6 @@ void managedCleanupDeletesOwnedRenderbuffersFromDestructibleClone() {
         assertTrue(driver.liveRenderbuffers.isEmpty());
     }
 
-    @Test
-    void singleTargetDisposalDeletesBothBuffers() {
-        FrameBuffer fb = bufferedFramebuffer(1);
-        renderer.setFrameBuffer(fb);
-        fb.dispose();
-        renderer.postFrame();
-        assertEquals(2, driver.deletedRenderbuffers.size());
-    }
-
     @Test
     void disposalBeforeRebindStillDeletesRemovedBuffers() {
         FrameBuffer fb = bufferedFramebuffer(2);