ref(grouping-title-ui): Remove title tree label code

[priscilawebdev]

Part of https://github.com/getsentry/sentry-options-automator/pull/2160 Related to https://github.com/getsentry/sentry/pull/76588

I was wondering if we should also remove the code related to is_prefix_frame and is_sentinel_frame. I'm unsure about hierarchical_hashes. do we want to remove that as well? @untitaker could you help us with this?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #76591       +/-   ##
===========================================
+ Coverage   66.99%   78.16%   +11.17%     
===========================================
  Files        6897     6901        +4     
  Lines      306824   306865       +41     
  Branches    52848    52836       -12     
===========================================
+ Hits       205557   239862    +34305     
+ Misses      94363    60594    -33769     
+ Partials     6904     6409      -495