refactor(Namespace): Remove sniff already covered by Generic.WhiteSpace.LanguageConstructSpacing

Author: klausi

coder_sniffer/Drupal/Sniffs/WhiteSpace/NamespaceSniff.php

@@ -383,6 +383,11 @@ protected function getErrorList(string $testFile): array
                 16 => 1,
                 31 => 1,
             ];
+        case 'NamespaceUnitTest.inc':
+            return [
+                1 => 1,
+                3 => 1,
+            ];
         case 'UnusedUseStatementUnitTest.inc':
             return [
                 5  => 1,