fix: remove tab group hash function

[yufeih]

Backport #7198

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.02 ⚠️

Comparison is base (71e1479) 76.90% compared to head (ce5f834) 76.89%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8942      +/-   ##
==========================================
- Coverage   76.90%   76.89%   -0.02%     
==========================================
  Files         605      605              
  Lines       25088    25074      -14     
==========================================
- Hits        19295    19280      -15     
- Misses       5793     5794       +1     

Impacted Files	Coverage Δ
...Engine.Extensions/Aggregator/TabGroupAggregator.cs	100.00% <ø> (ø)
...e.Extensions/TabGroup/HtmlTabGroupBlockRenderer.cs	100.00% <100.00%> (ø)
...MarkdigEngine.Extensions/TabGroup/TabGroupBlock.cs	100.00% <100.00%> (ø)
...igEngine.Extensions/TabGroup/TabGroupIdRewriter.cs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.