chore(ci): reduce number of jobs, remove build from lighthouse pipeline

[Simek]

Motivation

As @slorber noticed the increased number of jobs cause the CI to choke a bit, so I was advice to reduce the job count (at least for now).

This PR removes Node 14 from yarn-v1 E2E job and Node 10 from yarn-v2 E2E to retain at least one job on both version of Node.

Additionally I have removed the Node, install and build steps, since it looks like that they are redundant.

Have you read the Contributing Guidelines on pull requests?

Yes.

Test Plan

Run the CI.

Related PRs

• chore(ci): CI scripts cleanup, add Node 14 runs, bump checkout action #3849

[netlify]

Deploy preview for docusaurus-2 ready!

Built without sensitive environment variables with commit 6359f4c

https://deploy-preview-3861--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	88
🟢 Accessibility	99
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-3861--docusaurus-2.netlify.app/classic/

[github-actions]

Size Change: +20 B (0%)

Total Size: 157 kB

ℹ️ View Unchanged

Filename	Size	Change
website/build/blog/2017/12/14/introducing-docusaurus/index.html	20.7 kB	-1 B
website/build/docs/introduction/index.html	180 B	0 B
website/build/index.html	5.84 kB	+1 B
website/build/main.********.js	113 kB	+20 B (0%)
website/build/styles.********.css	17.5 kB	0 B

_{compressed-size-action}

[slorber]

thanks 👍