[ObsUX][INFRA] Remove-infra-from-babel-preset-styled-components

[MiriamAparicio]

Summary

After migrating infra plugin from styled-components to @emotion in this PR, this file was missed to update

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: efcb64e

Failed CI Steps

• Jest Tests #13

Test Failures

• [job] [logs] Jest Tests #13 / UserActionPropertyActions renders the property actions

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
infra	1543	1542	-1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
infra	1.8MB	1.7MB	-30.1KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
infra	57.9KB	57.8KB	-62.0B

Unknown metric groups

async chunk count

id	before	after	diff
infra	32	33	+1