Remove unused setting disablePromptForFeatures

[DonJayamanne]

Fixes #1551

This pull request:

• Has a title summarizes what is changing
• Includes a news entry file (remember to thank yourself!)

[d3r3kk]

Verified that this doesn't seem to be referenced anywhere else. Looks good. Code cleanup FTW. 👍

[codecov]

Codecov Report

Merging #1574 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1574      +/-   ##
==========================================
+ Coverage   71.65%   71.66%   +<.01%     
==========================================
  Files         273      273              
  Lines       12700    12697       -3     
  Branches     2282     2281       -1     
==========================================
- Hits         9100     9099       -1     
+ Misses       3465     3463       -2     
  Partials      135      135

Impacted Files	Coverage Δ
src/client/common/configSettings.ts	87.95% <ø> (-0.22%)	⬇️
src/client/common/types.ts	100% <ø> (ø)	⬆️
src/client/debugger/mainV2.ts	75.8% <0%> (+0.8%)	⬆️

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