Revert "[licensing] add license fetcher cache (#170006)"

[jbudz]

This reverts commit 21c0b0b.

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: a73901e

Failed CI Steps

• FTR Configs #67
• Investigations - Security Solution Cypress Tests #3
• Serverless Osquery Cypress Tests #3

Test Failures

• [job] [logs] Serverless Osquery Cypress Tests #3 / Alert Event Details "before each" hook for "should be able to add investigation guides to response actions" "before each" hook for "should be able to add investigation guides to response actions"
• [job] [logs] FTR Configs #67 / dashboard sync colors should sync colors on dashboard by default
• [job] [logs] Investigations - Security Solution Cypress Tests #3 / toggle column in timeline "before each" hook for "adds the _id field to the timeline when the user checks the field" "before each" hook for "adds the _id field to the timeline when the user checks the field"

Metrics [docs]

Page load bundle

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

id	before	after	diff
licensing	9.8KB	9.7KB	-66.0B

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@elasticmachine merge upstream