[DOC] Remove sidekiq integration under agent status validation section (#7846)
[DOC] Remove sidekiq integration under agent status validation section (#7846)

Removing the sidekiq validation section since sidekiq integration doesn't show up on agent status page because it is not the sort of integration where the Agent runs a Python check every <n> seconds. It is merely Dogstatsd waiting for metrics to be sent to it.

[Motivation](https://datadoghq.atlassian.net/browse/AGENT-5012?focusedCommentId=290152&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-290152)
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core