fix(download): remove dataframe index from download in dashboard

[pedrooot]

Context

When downloading the overview table from the dashboard the first column was the index. This pr removes this column.

Shout out @jfagoagas

Description

Please include a summary of the change and which issue is fixed. List any dependencies that are required for this change.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.77%. Comparing base (9c9d270) to head (79d02ad).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3739      +/-   ##
==========================================
- Coverage   85.82%   85.77%   -0.05%     
==========================================
  Files         722      722              
  Lines       22434    22434              
==========================================
- Hits        19253    19243      -10     
- Misses       3181     3191      +10     

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