Remove surface_environment_creation_failure feature flag

This commit removes the surface_environment_creation_failure
feature flag.

Changelog: changed

config/feature_flags/development/surface_environment_creation_failure.yml

----
-name: surface_environment_creation_failure
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/69537
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/340169
-milestone: '14.4'
-type: development
-group: group::release
-default_enabled: true

config/feature_flags/development/surface_environment_creation_failure_override.yml

----
-name: surface_environment_creation_failure_override
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/69537
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/340169
-milestone: '14.4'
-type: development
-group: group::release
-default_enabled: false

doc/ci/environments/index.md

@@ -878,11 +878,6 @@ To ensure the `action: stop` can always run when needed, you can:
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/21182) in GitLab 14.4.
 
-FLAG:
-On self-managed GitLab, by default this bug fix is available. To hide the bug fix per project,
-ask an administrator to [disable the feature flag](../../administration/feature_flags.md) named `surface_environment_creation_failure`.
-On GitLab.com, this bug fix is available.
-
 If your project is configured to [create a dynamic environment](#create-a-dynamic-environment),
 you might encounter this error because the dynamically generated parameter can't be used for creating an environment.
 

lib/gitlab/ci/pipeline/seed/build.rb

@@ -7,8 +7,6 @@ module Gitlab
         class Build < Seed::Base
           include Gitlab::Utils::StrongMemoize
 
-          EnvironmentCreationFailure = Class.new(StandardError)
-
           delegate :dig, to: :@seed_attributes
 
           def initialize(context, attributes, stages_for_needs_lookup = [])
@@ -107,22 +105,9 @@ module Gitlab
             environment = Seed::Environment.new(build).to_resource if environment.nil?
 
             unless environment.persisted?
-              if Feature.enabled?(:surface_environment_creation_failure, build.project, default_enabled: :yaml) &&
-                 Feature.disabled?(:surface_environment_creation_failure_override, build.project)
               return { status: :failed, failure_reason: :environment_creation_failure }
             end
 
-              # If there is a validation error on environment creation, such as
-              # the name contains invalid character, the build falls back to a
-              # non-environment job.
-              Gitlab::ErrorTracking.track_exception(
-                EnvironmentCreationFailure.new,
-                project_id: build.project_id,
-                reason: environment.errors.full_messages.to_sentence)
-
-              return { environment: nil }
-            end
-
             build.persisted_environment = environment
 
             {

spec/lib/gitlab/ci/pipeline/seed/build_spec.rb

@@ -452,25 +452,6 @@ RSpec.describe Gitlab::Ci::Pipeline::Seed::Build do
             expect(subject.metadata.expanded_environment_name).to be_nil
             expect(Environment.exists?(name: expected_environment_name)).to eq(false)
           end
-
-          context 'when surface_environment_creation_failure feature flag is disabled' do
-            before do
-              stub_feature_flags(surface_environment_creation_failure: false)
-            end
-
-            it_behaves_like 'non-deployment job'
-            it_behaves_like 'ensures environment inexistence'
-
-            it 'tracks an exception' do
-              expect(Gitlab::ErrorTracking).to receive(:track_exception)
-                .with(an_instance_of(described_class::EnvironmentCreationFailure),
-                      project_id: project.id,
-                      reason: %q{Name can contain only letters, digits, '-', '_', '/', '$', '{', '}', '.', and spaces, but it cannot start or end with '/'})
-                .once
-
-              subject
-            end
-          end
         end
       end
 

spec/spec_helper.rb

@@ -321,10 +321,6 @@ RSpec.configure do |config|
       # For more information check https://gitlab.com/gitlab-org/gitlab/-/issues/339348
       stub_feature_flags(new_header_search: false)
 
-      # Disable the override flag in order to enable the feature by default.
-      # See https://docs.gitlab.com/ee/development/feature_flags/#selectively-disable-by-actor
-      stub_feature_flags(surface_environment_creation_failure_override: false)
-
       allow(Gitlab::GitalyClient).to receive(:can_use_disk?).and_return(enable_rugged)
     else
       unstub_all_feature_flags