[MBL-806] Update (Remove) WebViewViewModel

[mtgriego]

📲 What

Remove the viewmodel for this activity, it wasnt doing anything

🤔 Why

RX1 is old and busted, making room for the new hotness

🛠 How

✂️

📋 QA

Test pages that are currently web view controlled (creator bio, updates, help, etc)

Story 📖

MBL-806

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (10a75aa) 74.27% compared to head (8c247c8) 74.25%.

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1925      +/-   ##
============================================
- Coverage     74.27%   74.25%   -0.03%     
  Complexity     1963     1963              
============================================
  Files           337      336       -1     
  Lines         19672    19653      -19     
  Branches       2718     2718              
============================================
- Hits          14612    14593      -19     
  Misses         3490     3490              
  Partials       1570     1570              

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