[ML-DataFrame] unmute tests for debuging purposes (#46121)

unmute testGetCheckpointStats

closes #45238

x-pack/plugin/data-frame/src/test/java/org/elasticsearch/xpack/dataframe/checkpoint/DataFrameTransformCheckpointServiceNodeTests.java

@@ -178,7 +178,6 @@ public void testCreateReadDeleteCheckpoint() throws InterruptedException {
                 DataFrameTransformCheckpoint.EMPTY, null, null);
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/45238")
     public void testGetCheckpointStats() throws InterruptedException {
         String transformId = randomAlphaOfLengthBetween(3, 10);
         long timestamp = 1000;