Removes ci_validate_job_length ff

Changelog: other

config/feature_flags/development/ci_validate_job_length.yml

----
-name: ci_validate_job_length
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/73599
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/344665
-milestone: '14.5'
-type: development
-group: group::pipeline authoring
-default_enabled: true

doc/ci/jobs/index.md

@@ -99,9 +99,10 @@ You can't use these keywords as job names:
 - `false`
 - `nil`
 
-Job names must be 255 characters or less. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/342800)
-in GitLab 14.5, [with a feature flag](../../administration/feature_flags.md) named `ci_validate_job_length`.
-Enabled by default. To disable it, ask an administrator to [disable the feature flag](../../administration/feature_flags.md).
+Job names must be 255 characters or less.
+
+> - [Enabled on GitLab.com](https://gitlab.com/gitlab-org/gitlab/-/issues/342800) in GitLab 14.5.
+> - [Generally available](https://gitlab.com/gitlab-org/gitlab/-/issues/344665) in GitLab 14.10.[Feature flag <ci_validate_job_length>](https://gitlab.com/gitlab-org/gitlab/-/issues/344665) removed.
 
 Use unique names for your jobs. If multiple jobs have the same name,
 only one is added to the pipeline, and it's difficult to predict which one is chosen.

lib/gitlab/ci/config/entry/processable.rb

@@ -23,7 +23,7 @@ module Gitlab
               validates :config, presence: true
               validates :name, presence: true
               validates :name, type: Symbol
-              validates :name, length: { maximum: 255 }, if: -> { ::Feature.enabled?(:ci_validate_job_length, default_enabled: :yaml) }
+              validates :name, length: { maximum: 255 }
 
               validates :config, disallowed_keys: {
                   in: %i[only except start_in],