[OSCI] Remove unused tutorials

[CMDWillYang]

Description

Removed unused tutorials from:
src/plugins/home/server/tutorials
src/plugins/home/public/assets/tutorials/logos

Issues Resolved

fixes #4448

Screenshot

Testing the changes

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
  • yarn test:ftr
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[CMDWillYang]

this is an unused import, and also the only usage of tutorials under src/plugins/home/server/tutorials

[joshuarrrr]

@CMDWillYang Either in this PR, or as a standalone followup, can you also delete this comment:

OpenSearch-Dashboards/src/plugins/home/server/services/tutorials/tutorials_registry.ts

Lines 97 to 100 in 0ff9bc5

	// pre-populate with built in tutorials
	// TODO: [RENAMEME] Need prod urls.
	// https://github.com/opensearch-project/OpenSearch-Dashboards/issues/335
	// this.tutorialProviders.push(...builtInTutorials);

[CMDWillYang]

In the last commit, I removed unused svg assets under src/plugins/home/public/assets/tutorials/logos.

To verify the those were not used, I mainly searched the whole repo for usage of these logos, and I've found that those in the logos folder were not used(see some screenshots below).

There does remain four png files under the tutorials folder (not tutorials/logos) that appear to be still used.

I know in the issue it's suggested to remove tutorials under src/plugins/home/public/application/components/tutorial. However, after some digging it appears most are still heavily used in other parts of the project, so I left those in for now.

If there's any suggestion on what more to remove, tips on how and where to search for additional used tutorials, or just feedback in general it would be greatly appreciated.

And of course, thanks so much to Josh for helping me here and at office hours to not completely drown in the sea of OpenSearch codebase :)

[codecov]

Codecov Report

Merging #5212 (8761e15) into main (466d298) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5212      +/-   ##
==========================================
- Coverage   66.81%   66.79%   -0.03%     
==========================================
  Files        3286     3286              
  Lines       63148    63148              
  Branches    10054    10054              
==========================================
- Hits        42191    42178      -13     
- Misses      18475    18486      +11     
- Partials     2482     2484       +2     

Flag	Coverage Δ
Linux_1	35.24% <ø> (ø)
Linux_2	55.25% <ø> (ø)
Linux_3	43.82% <ø> (ø)
Linux_4	35.34% <ø> (ø)
Windows_1	?
Windows_2	55.22% <ø> (ø)
Windows_3	?
Windows_4	35.34% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...me/server/services/tutorials/tutorials_registry.ts	66.66% <ø> (ø)

... and 3 files with indirect coverage changes

[joshuarrrr]

LGTM! Minor suggestion on the changelog entry.

[willie-hung]

LGTM as well!

[joshuarrrr]

I know in the issue it's suggested to remove tutorials under src/plugins/home/public/application/components/tutorial. However, after some digging it appears most are still heavily used in other parts of the project, so I left those in for now.

If there's any suggestion on what more to remove, tips on how and where to search for additional used tutorials, or just feedback in general it would be greatly appreciated.

@CMDWillYang Can you open a new issue for discussing what to do with these? I agree that we should probably handle them separately, and can add some additional context.