[Onboarding] Remove System Logs onboarding flow (#196132)

Closes #192815

Removes the legacy System Logs onboarding flow as it now has been
replaced by the Auto-Detect flow.

packages/deeplinks/observability/locators/observability_onboarding.ts

@@ -12,7 +12,9 @@ import { SerializableRecord } from '@kbn/utility-types';
 export const OBSERVABILITY_ONBOARDING_LOCATOR = 'OBSERVABILITY_ONBOARDING_LOCATOR' as const;
 
 export interface ObservabilityOnboardingLocatorParams extends SerializableRecord {
-  /** If given, it will load the given map else will load the create a new map page. */
-  source?: 'customLogs' | 'systemLogs';
+  /** If given, it will load the given onboarding flow
+   * else will load the main onboarding screen.
+   */
+  source?: 'auto-detect' | 'customLogs' | 'kubernetes' | 'otel-logs' | 'firehose';
   category?: string;
 }

x-pack/plugins/observability_solution/observability_onboarding/common/elastic_agent_logs/index.ts

@@ -6,4 +6,3 @@
  */
 
 export * from './custom_logs/generate_custom_logs_yml';
-export * from './system_logs/generate_system_logs_yml';

x-pack/plugins/observability_solution/observability_onboarding/e2e/cypress/e2e/logs/feedback.cy.ts

@@ -12,11 +12,6 @@ describe.skip('[Logs onboarding] Give Feedback', () => {
     cy.visitKibana('/app/observabilityOnboarding');
   });
 
-  it('feedback button is present in system logs onboarding', () => {
-    cy.getByTestSubj('obltOnboardingHomeStartSystemLogStream').click();
-    cy.getByTestSubj('observabilityOnboardingPageGiveFeedback').should('exist');
-  });
-
   it('feedback button is present in custom logs onboarding', () => {
     cy.getByTestSubj('obltOnboardingHomeStartLogFileStream').click();
     cy.getByTestSubj('observabilityOnboardingPageGiveFeedback').should('exist');