Remove dup script in Azp

Author: xumia

azure-pipelines.yml

@@ -94,14 +94,6 @@ stages:
         python3 setup.py test
       displayName: 'Test Python 3'
 
-    - script: |
-        sudo pip3 install diff-cover
-        target_branch=$(System.PullRequest.TargetBranch)
-        compare_branch=origin/${target_branch#refs/heads/}
-        diff-cover coverage.xml --compare-branch=$compare_branch
-      condition: eq(variables['Build.Reason'], 'PullRequest')
-      displayName: "Diff coverage"
-
     - task: PublishTestResults@2
       inputs:
         testResultsFiles: '$(System.DefaultWorkingDirectory)/test-results.xml'