remove duplicate pull requests scenario

Author: mattdholloway

pkg/github/instructions.go

@@ -67,10 +67,6 @@ func getGeneralInstructions(enabledToolsets []string) string {
 	}
 
 	scenarios := map[string]scenarioDefinition{
-		"Reviewing Pull Requests": {
-			instruction:      "Use get_pull_request to fetch PR details and get_pull_request_files to see changes. Use create_pending_pull_request_review to start a review, add_comment_to_pending_review for line-specific feedback, then submit_pending_pull_request_review to publish. Check get_pull_request_status to verify CI/CD checks before approving.",
-			requiredToolsets: []string{"pull_requests"},
-		},
 		"Triaging Security Alerts": {
 			instruction:      "Use list_dependabot_alerts, list_code_scanning_alerts, or list_secret_scanning_alerts with state='open' to find active security issues. Use get_*_alert for detailed information about specific alerts. For broader context, search list_global_security_advisories or get_global_security_advisory for known CVEs affecting your dependencies.",
 			requiredToolsets: []string{},