[BUG] MessagesViewController keep in memory after closing chat rooms

[filipealva]

@RocketChat/ios

Closes #2408

[codecov]

Codecov Report

Merging #2409 into develop will decrease coverage by 0.45%.
The diff coverage is 25%.

@@             Coverage Diff             @@
##           develop    #2409      +/-   ##
===========================================
- Coverage    26.02%   25.57%   -0.46%     
===========================================
  Files          447      444       -3     
  Lines        16770    16718      -52     
===========================================
- Hits          4365     4276      -89     
- Misses       12405    12442      +37

Impacted Files	Coverage Δ
...Controllers/Chat/ChatSections/MessageSection.swift	4.27% <ø> (ø)	⬆️
...cket.Chat/Controllers/Chat/MessagesViewModel.swift	35.02% <ø> (-0.17%)	⬇️
.../Chat/MessagesViewControllerComposerDelegate.swift	0% <ø> (ø)	⬆️
...Chat/Controllers/Chat/MessagesViewController.swift	39.29% <25%> (-2.63%)	⬇️
...odel/AuthSettingsManagerPersistencyExtension.swift	0% <0%> (-61.37%)	⬇️
...Chat/Managers/Socket/Response/SocketHandlers.swift	0% <0%> (-57.5%)	⬇️
Rocket.Chat/Managers/Socket/SocketManager.swift	17.54% <0%> (-24.57%)	⬇️
...Controllers/Auth/ConnectServerViewController.swift	45.54% <0%> (-12.88%)	⬇️
...at/API/Requests/General/LoginServicesRequest.swift	90% <0%> (-10%)	⬇️
Rocket.Chat/Managers/DraftMessageManager.swift	92% <0%> (-8%)	⬇️
... and 13 more

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[rafaelks]

🤓

[filipealva]

Hehe the imports helped me to track leaks related to Realm, so I removed to make sure there was no reference to realm in this file and ended up committing it