fix(llc): Persistence not removing hidden channels.

[xsahil03x]

Fixes: #1135

[codecov]

Codecov Report

Merging #1201 (a8a09a3) into develop (6048ca0) will decrease coverage by 0.00%.
The diff coverage is 33.33%.

@@             Coverage Diff             @@
##           develop    #1201      +/-   ##
===========================================
- Coverage    68.05%   68.04%   -0.01%     
===========================================
  Files          228      228              
  Lines        23490    23492       +2     
===========================================
+ Hits         15985    15986       +1     
- Misses        7505     7506       +1     

Impacted Files	Coverage Δ
packages/stream_chat/lib/src/client/client.dart	90.43% <33.33%> (-0.18%)	⬇️

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