remove mock test (Azure#24579)

Author: JiaqiZhang-Dev

eng/pipelines/templates/jobs/ci.tests.yml

@@ -77,9 +77,3 @@ jobs:
       EnableRaceDetector: ${{ parameters.EnableRaceDetector }}
       EnvVars:
         AZURE_RECORD_MODE: 'playback'
-
-- ${{ if and(startsWith(parameters.ServiceDirectory, 'resourcemanager'), ne(parameters.ServiceDirectory, 'resourcemanager/internal'), eq(parameters.OSName, 'linux')) }}:
-  - template: /eng/pipelines/templates/jobs/mgmt-mock-test.yml
-    parameters:
-      ServiceDirectory: ${{ parameters.ServiceDirectory }}
-      OSName: ${{ parameters.OSName }}