Workaround for #2148, and stop linking front_end/kernel in (#2149)

Author: jcollins-g

test/model_special_cases_test.dart

@@ -123,7 +123,7 @@ void main() {
       expect(initializeMe.isLate, isTrue);
       expect(initializeMe.features, contains('late'));
     });
-  });
+  }, skip: 'dart-lang/dartdoc#2148');
 
   group('HTML Injection when allowed', () {
     Class htmlInjection;

tool/grind.dart

@@ -452,10 +452,6 @@ Future<String> createSdkDartdoc() async {
 dependency_overrides:
   analyzer:
     path: '${sdkClone.path}/pkg/analyzer'
-  front_end:
-    path: '${sdkClone.path}/pkg/front_end'
-  kernel:
-    path: '${sdkClone.path}/pkg/kernel'
   _fe_analyzer_shared:
     path: '${sdkClone.path}/pkg/_fe_analyzer_shared'
 ''', mode: FileMode.append);