Consolidate mm-redux/actions into app/actions

Description

As part of the consolidation process:

  1. Remove unnecessary code (ie, code that doesn’t apply to the mobile app)

  2. Optimize wherever possible for better performance on the mobile app

QA Test Steps

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Mana

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Assignee

Miguel Alatzar

QA Assignee

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Reporter

Miguel Alatzar

Fix versions

Mattermost Team

Mobile

Sprint

None

Labels

QA Testing Areas

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GitHub Issue

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Components

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Configure