chore: remove react parallelism

[ZachJW34]

User facing changelog

n/a

Additional details

the npm-react job was running with parallelism = 8 but it wasn't splitting the files so it was duplicating the work across 8 machines. It only takes <5 minutes to run so I've removed it entirely.

Steps to test

Check out the latest develop npm-react job, then compare it to this PR's build.

How has the user experience changed?

na

PR Tasks

• [na] Have tests been added/updated?
• [na] Has the original issue (or this PR, if no issue exists) been tagged with a release in ZenHub? (user-facing changes only)
• [na] Has a PR for user-facing changes been opened in cypress-documentation?
• [na] Have API changes been updated in the type definitions?

[cypress-bot]

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[cypress]

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Test summary

39609 • 0 • 3371 • 0 • 0

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Run details

Project	cypress
Status	Passed
Commit	b053ba8
Started	Aug 26, 2022 4:48 PM
Ended	Aug 26, 2022 5:02 PM
Duration	14:12 💡
OS	Linux Debian - 11.3
Browser	Multiple

View run in Cypress Dashboard ➡️

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