Remove duplicated helper specs

This removes projects/ci/pipeline_editor_helper_spec.rb as it is
redundant with the specs in ci/pipeline_editor_helper_spec.rb.

spec/helpers/projects/ci/pipeline_editor_helper_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-RSpec.describe ::Ci::PipelineEditorHelper do
-  let_it_be(:project) { create(:project, :public, :repository) }
-
-  describe '#js_pipeline_editor_data' do
-    before do
-      allow(helper).to receive(:namespace_project_new_merge_request_path).and_return('/mock/project/-/merge_requests/new')
-    end
-
-    subject { helper.js_pipeline_editor_data(project) }
-
-    it {
-      is_expected.to match({
-        "ci-config-path": project.ci_config_path_or_default,
-        "commit-sha" => project.commit.sha,
-        "default-branch" => project.default_branch,
-        "empty-state-illustration-path" => match_asset_path("/assets/illustrations/empty-state/empty-dag-md.svg"),
-        "initial-branch-name": nil,
-        "lint-help-page-path" => help_page_path('ci/lint', anchor: 'validate-basic-logic-and-syntax'),
-        "new-merge-request-path" => '/mock/project/-/merge_requests/new',
-        "project-path" => project.path,
-        "project-full-path" => project.full_path,
-        "project-namespace" => project.namespace.full_path,
-        "yml-help-page-path" => help_page_path('ci/yaml/README')
-      })
-    }
-  end
-end