[CHORE] Remove the feature to block users locally from the app

[rafaelks]

@RocketChat/ios

[codecov]

Codecov Report

Merging #2510 into develop will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2510      +/-   ##
===========================================
+ Coverage     26.3%   26.33%   +0.02%     
===========================================
  Files          456      456              
  Lines        16944    16922      -22     
===========================================
- Hits          4457     4456       -1     
+ Misses       12487    12466      -21

Impacted Files	Coverage Δ
Rocket.Chat/Models/Message/Message.swift	88.57% <ø> (ø)	⬆️
...t.Chat/Models/Subscription/SubscriptionUtils.swift	34.17% <ø> (ø)	⬆️
...at/MessagesViewControllerMessageCellProtocol.swift	0% <ø> (ø)	⬆️
...cket.Chat/Models/Mapping/MessageModelMapping.swift	69.44% <ø> (-0.29%)	⬇️
...Managers/Model/MessageManager/MessageManager.swift	28.23% <ø> (+4.47%)	⬆️

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