Removed fixed dependencies

packages/dart_style/test/whitespace/classes.unit

 40 columns                              |
 >>> indentation
 class A {
 var z;
 inc(int x) => ++x;
 foo(int x) {
 if (x == 0) {
 return true;
 }}}
 <<<
@@ skipping 81 matching lines @@
 <<<
 class Foo {
   var a = 1;
   b() {}
   c() => null;
   get d {}
   get e => null;
   set f(value) {}
   set g(value) => null;
   var h = 1;
+}
+>>> covariant field (skip: published version of analyzer doesn't support 'covariant yet')
+class Foo {
+ covariant    var bar;
+  covariant    int baz;
+@wat  covariant    int zoop;
+}
+<<<
+class Foo {
+  covariant var bar;
+  covariant int baz;
+  @wat
+  covariant int zoop;
 }