[8.6] [Fleet] removed unused telemetry usage schema (#149210) (#149250)

# Backport

This will backport the following commits from `main` to `8.6`:
- [[Fleet] removed unused telemetry usage schema
(#149210)](https://github.com/elastic/kibana/pull/149210)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Julia
Bardi","email":"90178898+juliaElastic@users.noreply.github.com"},"sourceCommit":{"committedDate":"2023-01-19T17:06:54Z","message":"[Fleet]
removed unused telemetry usage schema (#149210)\n\n##
Summary\r\n\r\nFollow up for
https://github.com/elastic/kibana/pull/148981\r\n\r\nRemoved unused
agent error logs from telemetry schema to fix this
error\r\n\r\n```\r\n[2023-01-19T10:04:18.443+01:00][ERROR][plugins.fleet]
Error occurred while sending Fleet Usage telemetry: Error: Failed to
validate payload coming from \"Event Type 'fleet_usage'\":\r\n -
[fleet_server.inactive]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server.unenrolled]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [agent_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n```\r\n\r\nThe
fleet server new statuses are not yet published to telemetry,
so\r\nremoved for now. This will be fixed
in\r\nhttps://github.com/elastic/kibana/issues/148720","sha":"b2fdc3d67a22e4b98ee7663413f88e3e2d11803b","branchLabelMapping":{"^v8.7.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","Team:Fleet","v8.7.0","v8.6.1"],"number":149210,"url":"https://github.com/elastic/kibana/pull/149210","mergeCommit":{"message":"[Fleet]
removed unused telemetry usage schema (#149210)\n\n##
Summary\r\n\r\nFollow up for
https://github.com/elastic/kibana/pull/148981\r\n\r\nRemoved unused
agent error logs from telemetry schema to fix this
error\r\n\r\n```\r\n[2023-01-19T10:04:18.443+01:00][ERROR][plugins.fleet]
Error occurred while sending Fleet Usage telemetry: Error: Failed to
validate payload coming from \"Event Type 'fleet_usage'\":\r\n -
[fleet_server.inactive]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server.unenrolled]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [agent_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n```\r\n\r\nThe
fleet server new statuses are not yet published to telemetry,
so\r\nremoved for now. This will be fixed
in\r\nhttps://github.com/elastic/kibana/issues/148720","sha":"b2fdc3d67a22e4b98ee7663413f88e3e2d11803b"}},"sourceBranch":"main","suggestedTargetBranches":["8.6"],"targetPullRequestStates":[{"branch":"main","label":"v8.7.0","labelRegex":"^v8.7.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/149210","number":149210,"mergeCommit":{"message":"[Fleet]
removed unused telemetry usage schema (#149210)\n\n##
Summary\r\n\r\nFollow up for
https://github.com/elastic/kibana/pull/148981\r\n\r\nRemoved unused
agent error logs from telemetry schema to fix this
error\r\n\r\n```\r\n[2023-01-19T10:04:18.443+01:00][ERROR][plugins.fleet]
Error occurred while sending Fleet Usage telemetry: Error: Failed to
validate payload coming from \"Event Type 'fleet_usage'\":\r\n -
[fleet_server.inactive]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server.unenrolled]:
{\"expected\":\"number\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [agent_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n
- [fleet_server_logs_top_errors]:
{\"expected\":\"Array<string>\",\"actual\":\"undefined\",\"value\":\"undefined\"}\r\n```\r\n\r\nThe
fleet server new statuses are not yet published to telemetry,
so\r\nremoved for now. This will be fixed
in\r\nhttps://github.com/elastic/kibana/issues/148720","sha":"b2fdc3d67a22e4b98ee7663413f88e3e2d11803b"}},{"branch":"8.6","label":"v8.6.1","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Julia Bardi <90178898+juliaElastic@users.noreply.github.com>

x-pack/plugins/fleet/server/services/telemetry/fleet_usages_schema.ts

@@ -177,18 +177,4 @@ export const fleetUsagesSchema: RootSchema<any> = {
       },
     },
   },
-  agent_logs_top_errors: {
-    type: 'array',
-    items: {
-      type: 'text',
-      _meta: { description: 'Top messages from agent error logs' },
-    },
-  },
-  fleet_server_logs_top_errors: {
-    type: 'array',
-    items: {
-      type: 'text',
-      _meta: { description: 'Top messages from fleet server error logs' },
-    },
-  },
 };