fix: remove teamsfx_da_metaos flag from listenabled

Author: jainsammicrosoft

packages/fx-core/tests/common/featureFlags.test.ts

@@ -42,6 +42,6 @@ describe("FeatureFlagManager", () => {
   it("listEnabled", async () => {
     mockedEnvRestore = mockedEnv({ TEAMSFX_CLI_DOTNET: "true", SME_OAUTH: "true" });
     const list = featureFlagManager.listEnabled();
-    chai.assert.deepEqual(list, ["TEAMSFX_CLI_DOTNET", "SME_OAUTH", "TEAMSFX_DA_METAOS"]);
+    chai.assert.deepEqual(list, ["TEAMSFX_CLI_DOTNET", "SME_OAUTH"]);
   });
 });