[8.9](backport #3554) Remove unused APM attributes

docs/en/apm-server/version.asciidoc

@@ -1,10 +1,13 @@
+<<<<<<< HEAD:docs/en/apm-server/version.asciidoc
 // doc-branch can be: master, 8.0, 8.1, etc.
 :doc-branch: master
 :go-version: 1.19.10
 :python: 3.7
 :docker: 1.12
 :docker-compose: 1.11
 
+=======
+>>>>>>> 094640ed (remove unused attrs (#3554)):docs/en/observability/apm/version.asciidoc
 include::{asciidoc-dir}/../../shared/versions/stack/{source_branch}.asciidoc[]
 
 // Agent link attributes

docs/en/observability/apm.asciidoc

@@ -1,6 +1,60 @@
 [[apm]]
 = Application performance monitoring (APM)
 
+<<<<<<< HEAD
+=======
+:apm-integration-docs:
+:obs-repo-dir:           {observability-docs-root}/docs/en
+
+:github_repo_link: https://github.com/elastic/apm-server/blob/v{version}
+ifeval::["{version}" == "8.0.0"]
+:github_repo_link: https://github.com/elastic/apm-server/blob/main
+endif::[]
+
+
+// OTHER ATTRS
+// TODO: Check that these are still relevant
+:version: {apm_server_version}
+:beatname_lc: apm-server
+:beatname_uc: APM Server
+:beatname_pkg: {beatname_lc}
+:beat_kib_app: APM app
+:beat_monitoring_user: apm_system
+:beat_monitoring_user_version: 6.5.0
+:beat_monitoring_version: 6.5
+:beat_default_index_prefix: apm
+:access_role: {beat_default_index_prefix}_user
+:beat_version_key: observer.version
+:dockerimage: docker.elastic.co/apm/{beatname_lc}:{version}
+:dockergithub: https://github.com/elastic/apm-server-docker/tree/{branch}
+:dockerconfig: https://raw.githubusercontent.com/elastic/apm-server/{branch}/apm-server.docker.yml
+:discuss_forum: apm
+:github_repo_name: apm-server
+:sample_date_0: 2019.10.20
+:sample_date_1: 2019.10.21
+:sample_date_2: 2019.10.22
+:repo: apm-server
+:no_kibana:
+:no_ilm:
+:no-pipeline:
+:no-processors:
+:no-indices-rules:
+:no_dashboards:
+:apm-server:
+:deb_os:
+:rpm_os:
+:mac_os:
+:docker_platform:
+:win_os:
+:linux_os:
+
+:downloads: https://artifacts.elastic.co/downloads/apm-server
+
+// Temporary attributes
+:which-guide:            observability
+:apm-server-dir:         {observability-docs-root}/docs/en/observability/apm
+
+>>>>>>> 094640ed (remove unused attrs (#3554))
 Elastic APM is an application performance monitoring system built on the {stack}.
 It allows you to monitor software services and applications in real time, by
 collecting detailed performance information on response time for incoming requests,