Update tests.yml (Azure#27311)

Author: Yalin Li

sdk/appconfiguration/tests.yml

@@ -8,11 +8,6 @@ stages:
       MatrixReplace:
         - TestSamples=.*/true
       EnvVars:
-        APP_CONFIG_CONNECTION: $(python-appconfiguration-connection-string)
-        APP_CONFIG_ENDPOINT: $(python-appconfiguration-endpoint-string)
-        AZURE_CLIENT_ID: $(aad-azure-sdk-test-client-id)
-        AZURE_CLIENT_SECRET: $(aad-azure-sdk-test-client-secret)
-        AZURE_TENANT_ID: $(aad-azure-sdk-test-tenant-id)
         TEST_MODE: 'RunLiveNoRecord'
         AZURE_SKIP_LIVE_RECORDING: 'true'
         AZURE_TEST_RUN_LIVE: 'true'