MTA-2395: Tax module functional tests maintenance

Author: Vitaliy Honcharenko

dev/tests/functional/tests/app/Magento/Tax/Test/TestCase/CreateTaxRuleEntityTest.php

@@ -29,7 +29,6 @@ class CreateTaxRuleEntityTest extends Injectable
     const MVP = 'yes';
     const DOMAIN = 'CS';
     const TEST_TYPE = 'acceptance_test';
-    const STABLE = 'no';
     /* end tags */
 
     /**

dev/tests/functional/tests/app/Magento/Tax/Test/TestCase/TaxCalculationTest.php

@@ -34,16 +34,6 @@ class TaxCalculationTest extends Scenario
     const DOMAIN = 'CS';
     /* end tags */
 
-    /**
-     * Skip failed tests.
-     *
-     * @return void
-     */
-    public static function setUpBeforeClass()
-    {
-        self::markTestIncomplete("Epic: MAGETWO-30073");
-    }
-
     /**
      * Runs tax calculation test.
      *

dev/tests/functional/tests/app/Magento/Tax/Test/TestCase/UpdateTaxRuleEntityTest.php

@@ -33,7 +33,6 @@ class UpdateTaxRuleEntityTest extends Injectable
     /* tags */
     const MVP = 'yes';
     const DOMAIN = 'CS';
-    const TO_MAINTAIN = 'yes';
     /* end tags */
 
     /**