[9.0][Build]Remove superflous ironbank docker test (elastic#136170)

This is related to elastic#135668

Author: breskeby

qa/packaging/src/test/java/org/elasticsearch/packaging/test/DockerTests.java

@@ -1178,23 +1178,6 @@ public void test300IronBankImagesHaveLicenseDirectory() {
         assertThat(ubiLicense, equalTo(distroLicense));
     }
 
-    /**
-     * Check that the Iron Bank image doesn't define extra labels
-     */
-    public void test310IronBankImageHasNoAdditionalLabels() throws Exception {
-        assumeTrue(distribution.packaging == Packaging.DOCKER_IRON_BANK);
-
-        final Map<String, String> labels = getImageLabels(distribution);
-
-        final Set<String> labelKeys = labels.keySet();
-
-        // We can't just assert that the labels map is empty, because it can inherit labels from its base.
-        // This is certainly the case when we build the Iron Bank image using a UBI base. It is unknown
-        // if that is true for genuine Iron Bank builds.
-        assertFalse(labelKeys.stream().anyMatch(l -> l.startsWith("org.label-schema.")));
-        assertFalse(labelKeys.stream().anyMatch(l -> l.startsWith("org.opencontainers.")));
-    }
-
     /**
      * Check that the Cloud image contains the required Beats
      */