[docs] Remove duplicate paragraph in celery tasks documentation

[thoralf-gutierrez]

CATEGORY

• Documentation

SUMMARY

The duplicate paragraph was introduced here 8086224#diff-548eb9ce4cac8e13a1238ad703272931R608

This commit removes it.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

REVIEWERS

[codecov-io]

Codecov Report

Merging #7392 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #7392   +/-   ##
=======================================
  Coverage   64.89%   64.89%           
=======================================
  Files         428      428           
  Lines       20979    20979           
  Branches     2337     2337           
=======================================
  Hits        13615    13615           
  Misses       7240     7240           
  Partials      124      124

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