test(NODE-4322): unskip other test

Author: durran

test/integration/sessions/sessions.spec.test.ts

@@ -2,8 +2,5 @@ import { loadSpecTests } from '../../spec';
 import { runUnifiedSuite } from '../../tools/unified-spec-runner/runner';
 
 describe('Sessions spec tests', function () {
-  runUnifiedSuite(loadSpecTests('sessions'), [
-    // TODO(NODE-3951): fix broken dirty sessions spec tests
-    'Dirty explicit session is discarded (findAndModify)'
-  ]);
+  runUnifiedSuite(loadSpecTests('sessions'));
 });

test/integration/unified-test-format/unified_test_format.spec.test.ts

@@ -19,9 +19,6 @@ const SKIPPED_TESTS = [
   // TODO(NODE-2034): Will be implemented as part of NODE-2034
   'Client side error in command starting transaction',
 
-  // TODO(NODE-3951): investigate why this is failing while the legacy version is passing
-  'Dirty explicit session is discarded',
-
   // TODO(NODE-3308):
   'A successful find event with a getmore and the server kills the cursor',