fix: restore default validation rules without absolute path override

Author: reidbaker

tool/test/validate_skills_test.dart

@@ -29,11 +29,6 @@ void main() {
       final bool isValid = await validateSkills(
         skillDirPaths: [skillsDirPath],
         config: config,
-        resolvedRuleConfigs: {
-          'check-absolute-paths': const RuleConfigPatch(
-            severity: AnalysisSeverity.disabled,
-          ),
-        },
       );
       expect(
         isValid,