[8.18](backport #8715) Remove logs indicating unprivileged installation mode is still in beta (#8721)

* Remove logs indicating unprivileged installation mode is still in beta (#8715)

* Remove unprivileged beta logs.

* Add changelog.

(cherry picked from commit 69a839c)

# Conflicts:
#	internal/pkg/agent/cmd/install.go

* Fix conflict in internal/pkg/agent/cmd/install.go

---------

Co-authored-by: Craig MacKenzie <[email protected]>

Author: mergify[bot]

changelog/fragments/1751037802-Stop-logging-that-unprivileged-installations-are-in-beta.yaml

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: bug-fix
+
+# Change summary; a 80ish characters long description of the change.
+summary: Remove incorrect logging that unprivileged installations are in beta.
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+description: "Unprivileged installations went GA in 8.15.0: https://www.elastic.co/docs/reference/fleet/elastic-agent-unprivileged"
+
+# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
+component: "elastic-agent"
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+pr: https://github.com/elastic/elastic-agent/pull/8715
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+issue: https://github.com/elastic/elastic-agent/issues/8689

internal/pkg/agent/cmd/install.go

@@ -56,7 +56,7 @@ would like the Agent to operate.
 	cmd.Flags().BoolP("force", "f", false, "Force overwrite the current installation and do not prompt for confirmation")
 	cmd.Flags().BoolP("non-interactive", "n", false, "Install Elastic Agent in non-interactive mode which will not prompt on missing parameters but fails instead.")
 	cmd.Flags().String(flagInstallBasePath, paths.DefaultBasePath, "The path where the Elastic Agent will be installed. It must be an absolute path.")
-	cmd.Flags().Bool(flagInstallUnprivileged, false, "Install in unprivileged mode, limiting the access of the Elastic Agent. (beta)")
+	cmd.Flags().Bool(flagInstallUnprivileged, false, "Install in unprivileged mode, limiting the access of the Elastic Agent.")
 
 	cmd.Flags().Bool(flagInstallRunUninstallFromBinary, false, "Run the uninstall command from this binary instead of using the binary found in the system's path.")
 	_ = cmd.Flags().MarkHidden(flagInstallRunUninstallFromBinary) // Advanced option to force a new agent to override an existing installation, it may orphan installed components.
@@ -102,7 +102,7 @@ func installCmd(streams *cli.IOStreams, cmd *cobra.Command) error {
 
 	unprivileged, _ := cmd.Flags().GetBool(flagInstallUnprivileged)
 	if unprivileged {
-		fmt.Fprintln(streams.Out, "Unprivileged installation mode enabled; this feature is currently in beta.")
+		fmt.Fprintln(streams.Out, "Unprivileged installation mode enabled.")
 	}
 
 	isDevelopmentMode, _ := cmd.Flags().GetBool(flagInstallDevelopment)