Remove another outdated assertion from SearchQueryThenFetchAsyncActionTests (elastic#122086) (elastic#125869)

Same reasoning as in 2b410c4,
with the now weaker ordering guarantees from optimizations this
assertion stopped being reliable.

back port of elastic#122086

closes elastic#122911

Author: original-brownbear

muted-tests.yml

@@ -246,9 +246,6 @@ tests:
 - class: org.elasticsearch.packaging.test.DockerTests
   method: test151MachineDependentHeapWithSizeOverride
   issue: https://github.com/elastic/elasticsearch/issues/123437
-- class: org.elasticsearch.action.search.SearchQueryThenFetchAsyncActionTests
-  method: testBottomFieldSort
-  issue: https://github.com/elastic/elasticsearch/issues/122911
 - class: org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT
   method: test {yaml=reference/cat/nodes/line_361}
   issue: https://github.com/elastic/elasticsearch/issues/124103

server/src/test/java/org/elasticsearch/action/search/SearchQueryThenFetchAsyncActionTests.java

@@ -219,12 +219,8 @@ protected void run() {
             if (withScroll) {
                 assertFalse(canReturnNullResponse.get());
                 assertThat(numWithTopDocs.get(), equalTo(0));
-            } else {
-                if (withCollapse) {
-                    assertThat(numWithTopDocs.get(), equalTo(0));
-                } else {
-                    assertThat(numWithTopDocs.get(), greaterThanOrEqualTo(1));
-                }
+            } else if (withCollapse) {
+                assertThat(numWithTopDocs.get(), equalTo(0));
             }
             SearchPhaseController.ReducedQueryPhase phase = action.results.reduce();
             assertThat(phase.numReducePhases(), greaterThanOrEqualTo(1));