remove whitespace check from the pipeline

Author: basnijholt

azure-pipelines.yml

@@ -21,10 +21,6 @@ steps:
   continueOnError: true
   displayName: 'Authors check'
 
-- script: ./check_whitespace
-  continueOnError: true
-  displayName: 'Whitespace check'
-
 - script: |
     source activate adaptive
     black . --check -t py36