Removed tawk script and associated functions

[dstopp]

• Fixes #1286
• Were any Django, import pipeline, or table_schema files modified? Y
  • If YES:
  • Database used (or new import): opus3_test_221206
  • FLAKE8 run on modified code: NA
  • All Django tests pass: Y
  • Code coverage run and still at 100%: Y
• Were any JavaScript or CSS files modified? Y
  • If YES:
  • JSHINT run on all affected files: Y
  • Tested on Chrome, Firefox, Safari, Edge, and iOS: NA (Remember to test all browser sizes)
  • Tested for race conditions (with delayed API calls if applicable): NA
• Was the documentation reviewed for necessary changes or additions? NA
  • About
  • Getting Started
  • FAQ
  • API Guide
  • Tooltips
  • Import/database schema

Description of changes:

Known problems: