chore: remove multi-organization and custom role experiment (#14862)

Closes https://github.com/coder/coder/issues/14704

---------

Co-authored-by: Kayla Washburn-Love <mckayla@hey.com>

enterprise/cli/create_test.go

@@ -37,11 +37,8 @@ func TestEnterpriseCreate(t *testing.T) {
 	// setupMultipleOrganizations creates an extra organization, assigns a member
 	// both organizations, and optionally creates templates in each organization.
 	setupMultipleOrganizations := func(t *testing.T, args setupArgs) setupData {
-		dv := coderdtest.DeploymentValues(t)
-		dv.Experiments = []string{string(codersdk.ExperimentMultiOrganization)}
 		ownerClient, first := coderdenttest.New(t, &coderdenttest.Options{
 			Options: &coderdtest.Options{
-				DeploymentValues: dv,
 				// This only affects the first org.
 				IncludeProvisionerDaemon: true,
 			},