Removed fixed dependencies

packages/dart_style/test/splitting/parameters.unit

 40 columns                              |
 >>> long parameters list, this.field
 class Foo {
   Foo(this.first, this.second, this.third, this.fourth);
 }
 <<<
 class Foo {
   Foo(this.first, this.second,
       this.third, this.fourth);
 }
 >>> indent parameters more if body is a wrapped =>
 method(int firstArgument, int argumentTwo) => "very long body that must wrap";
 <<<
 method(int firstArgument,
         int argumentTwo) =>
-    "very long body that must wrap";
+    "very long body that must wrap";
+>>> split before "covariant" (skip: published version of analyzer doesn't support 'covariant yet')
+class A {
+  longMethod(covariant parameterNameHere) {}
+}
+<<<
+class A {
+  longMethod(
+      covariant parameterNameHere) {}
+}
+>>> split before "covariant" with multiple parameters (skip: published version of analyzer doesn't support 'covariant yet')
+class A {
+  longMethod(covariant first, second, covariant int third(parameter), fourth) {}
+}
+<<<
+class A {
+  longMethod(
+      covariant first,
+      second,
+      covariant int third(parameter),
+      fourth) {}
+}
+>>> never split after "covariant" (at least for now) (skip: published version of analyzer doesn't support 'covariant yet')
+class A {
+  longMethod(covariant int veryLongParameterNameWow) {}
+}
+<<<
+class A {
+  longMethod(
+      covariant int veryLongParameterNameWow) {}
+}