[RUN AS-IF-FOSS] Remove `:incident_sla_dev` feature flag

config/feature_flags/development/incident_sla_dev.yml

----
-name: incident_sla_dev
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/43648
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/266931
-group: group::health
-type: development
-default_enabled: false

doc/api/graphql/reference/gitlab_schema.graphql

@@ -6913,7 +6913,7 @@ type EpicIssue implements CurrentUserTodos & Noteable {
   severity: IssuableSeverity
 
   """
-  Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled.
+  Timestamp of when the issue SLA expires.
   """
   slaDueAt: Time
 
@@ -9112,7 +9112,7 @@ type Issue implements CurrentUserTodos & Noteable {
   severity: IssuableSeverity
 
   """
-  Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled.
+  Timestamp of when the issue SLA expires.
   """
   slaDueAt: Time
 

doc/api/graphql/reference/gitlab_schema.json

@@ -18980,7 +18980,7 @@
             },
             {
               "name": "slaDueAt",
-              "description": "Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled.",
+              "description": "Timestamp of when the issue SLA expires.",
               "args": [
 
               ],
@@ -24752,7 +24752,7 @@
             },
             {
               "name": "slaDueAt",
-              "description": "Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled.",
+              "description": "Timestamp of when the issue SLA expires.",
               "args": [
 
               ],

doc/api/graphql/reference/index.md

@@ -1089,7 +1089,7 @@ Relationship between an epic and an issue.
 | `relationPath` | String | URI path of the epic-issue relation |
 | `relativePosition` | Int | Relative position of the issue (used for positioning in epic tree and issue boards) |
 | `severity` | IssuableSeverity | Severity level of the incident |
-| `slaDueAt` | Time | Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled. |
+| `slaDueAt` | Time | Timestamp of when the issue SLA expires. |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |
@@ -1280,7 +1280,7 @@ Represents a recorded measurement (object count) for the Admins.
 | `reference` | String! | Internal reference of the issue. Returned in shortened format by default |
 | `relativePosition` | Int | Relative position of the issue (used for positioning in epic tree and issue boards) |
 | `severity` | IssuableSeverity | Severity level of the incident |
-| `slaDueAt` | Time | Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled. |
+| `slaDueAt` | Time | Timestamp of when the issue SLA expires. |
 | `state` | IssueState! | State of the issue |
 | `statusPagePublishedIncident` | Boolean | Indicates whether an issue is published to the status page |
 | `subscribed` | Boolean! | Indicates the currently logged in user is subscribed to the issue |

ee/app/graphql/ee/types/issue_type.rb

@@ -31,7 +31,7 @@ module EE
           description: 'Indicates whether an issue is published to the status page'
 
         field :sla_due_at, ::Types::TimeType, null: true,
-          description: 'Timestamp of when the issue SLA expires. Returns null if `incident_sla_dev` feature flag is disabled.'
+          description: 'Timestamp of when the issue SLA expires.'
       end
     end
   end

ee/changelogs/unreleased/tr-incident-sla-feature-flag-removal.yml

+---
+title: Introduce optional Service Level Agreement (SLA) for Incidents
+merge_request: 45085
+author:
+type: added

ee/lib/incident_management/incident_sla.rb

@@ -4,7 +4,7 @@ module IncidentManagement
   module IncidentSla
     class << self
       def available_for?(project)
-        ::Feature.enabled?(:incident_sla_dev, project) && project.feature_available?(:incident_sla)
+        project.feature_available?(:incident_sla)
       end
     end
   end

ee/spec/models/issue_spec.rb

@@ -817,16 +817,14 @@ RSpec.describe Issue do
 
     subject { issue.sla_available? }
 
-    where(:feature_enabled, :incident_type, :license_available, :sla_available) do
-      false | true  | true  | false
-      true  | false | true  | false
-      true  | true  | false | false
-      true  | true  | true  | true
+    where(:incident_type, :license_available, :sla_available) do
+      false | true  | false
+      true  | false | false
+      true  | true  | true
     end
 
     with_them do
       before do
-        stub_feature_flags(incident_sla_dev: feature_enabled)
         stub_licensed_features(incident_sla: license_available)
         issue_type = incident_type ? 'incident' : 'issue'
         issue.update(issue_type: issue_type)