MQE-978: Create Test Coverage Around SuiteGenerator Class

 - Removing CLEARED_MANIFESTS reference
 - Adjusting comment text

Author: aljcalandra

dev/tests/unit/Magento/FunctionalTestFramework/Suite/SuiteGeneratorTest.php

@@ -50,7 +50,7 @@ public function testGenerateSuite()
         $mockSuiteGenerator = SuiteGenerator::getInstance();
         $mockSuiteGenerator->generateSuite("basicTestSuite");
 
-        // assert on that expected suite is generated
+        // assert that expected suite is generated
         $this->expectOutputString("Suite basicTestSuite generated to _generated/basicTestSuite." . PHP_EOL);
     }
 
@@ -83,7 +83,7 @@ public function testGenerateAllSuites()
         $mockSuiteGenerator = SuiteGenerator::getInstance();
         $mockSuiteGenerator->generateAllSuites($exampleTestManifest);
 
-        // assert on created suite object
+        // assert that expected suites are generated
         $this->expectOutputString("Suite basicTestSuite generated to _generated/basicTestSuite." . PHP_EOL);
     }
 
@@ -99,10 +99,6 @@ private function setMockTestAndSuiteParserOutput($testData, $suiteData)
         $property->setAccessible(true);
         $property->setValue(null);
 
-        $property = new \ReflectionProperty(DefaultTestManifest::class, 'CLEARED_MANIFESTS');
-        $property->setAccessible(true);
-        $property->setValue(["sample/path"]);
-
         // clear test object handler value to inject parsed content
         $property = new \ReflectionProperty(TestObjectHandler::class, 'testObjectHandler');
         $property->setAccessible(true);