[Transform] Remove extra reset calls

ESRestTestCase already calls the `_reset` API, we do not need to do it
twice.

Author: prwhelan

x-pack/plugin/transform/qa/single-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/transform/integration/TransformGetAndGetStatsIT.java

@@ -64,11 +64,6 @@ public void createIndexes() throws IOException {
 
     }
 
-    @After
-    public void clearOutTransforms() throws Exception {
-        adminClient().performRequest(new Request("POST", "/_features/_reset"));
-    }
-
     @SuppressWarnings("unchecked")
     public void testGetAndGetStats() throws Exception {
         createPivotReviewsTransform("pivot_1", "pivot_reviews_1", null);

x-pack/plugin/transform/qa/single-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/transform/integration/TransformRestTestCase.java

@@ -647,9 +647,6 @@ protected static void deleteTransform(String transformId, boolean ignoreNotFound
     public void waitForTransform() throws Exception {
         ensureNoInitializingShards();
         logAudits();
-        if (preserveClusterUponCompletion() == false) {
-            adminClient().performRequest(new Request("POST", "/_features/_reset"));
-        }
     }
 
     @AfterClass

x-pack/plugin/transform/qa/single-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/transform/integration/TransformTaskFailedStateIT.java

@@ -52,11 +52,6 @@ public void setClusterSettings() throws IOException {
         client().performRequest(addFailureRetrySetting);
     }
 
-    @After
-    public void cleanUpPotentiallyFailedTransform() throws Exception {
-        adminClient().performRequest(new Request("POST", "/_features/_reset"));
-    }
-
     public void testForceStopFailedTransform() throws Exception {
         String transformId = "test-force-stop-failed-transform";
         createReviewsIndex(REVIEWS_INDEX_NAME, 10, 27, "date", false, -1, null);

x-pack/plugin/transform/qa/single-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/transform/integration/TransformUpgradeModeIT.java

@@ -51,11 +51,6 @@ public void createIndexes() throws IOException {
         indicesCreated = true;
     }
 
-    @After
-    public void clearOutTransforms() throws Exception {
-        adminClient().performRequest(new Request("POST", "/_features/_reset"));
-    }
-
     public void testUpgradeMode() throws Exception {
         var transformId = startTransform();