Remove search and post

[akarki2005]

Proposed Changes

Currently, the search and post components are not enabled by default in the Courseography application, as their use has been deprecated. In spite of this, the components remain in the codebase, and in addition, the /depts route and its related functions and tests remain as well. This change seeks to clean up the codebase by removing these two unused components, as well as any related routing and backend modules.

Type of Change

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Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
✨ New feature (non-breaking change that adds functionality)
🐛 Bug fix (non-breaking change that fixes an issue)
🎨 User interface change (change to user interface; provide screenshots)
♻️ Refactoring (internal change to codebase, without changing functionality)
🚦 Test update (change that only adds or modifies tests)
📦 Dependency update (change that updates a dependency)
🔧 Internal (change that only affects developers or continuous integration)	X

Checklist

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Before opening your pull request:

• I have performed a self-review of my changes.
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• [N/A] I have added tests for my changes, if applicable.
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Questions and Comments

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[coveralls]

Pull Request Test Coverage Report for Build 928e71fe-0b76-473c-9b8e-15c9e1c61bac

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 40.563%

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Totals
Change from base Build 89affbdb-04b4-4516-8200-f96ebbffa86b:	-0.2%
Covered Lines:	628
Relevant Lines:	1514

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💛 - Coveralls

[david-yz-liu]

@akarki2005 this is a good start, but there's even more code to delete. You mainly focused work on the front-end, but in the back-end the routes "post", "post-progress", and "timesearch" can also be deleted. Note that you should be looking at files in the back-end with names like "Post" and "Search" as well.

[david-yz-liu]

In general you should not delete old Changelog entries, even if they are no longer applicable.