Remove temporary mechanism for skipping CBOR tests.

The CBOR decode and "appendix a" unit tests cover specific serialization behaviors that were known
to be incomplete at the time. Now that all of those cases have been addressed, the mechanism for
skipping those tests can be removed.

staging/src/k8s.io/apimachinery/pkg/runtime/serializer/cbor/internal/modes/appendixa_test.go

@@ -69,10 +69,6 @@ func TestAppendixA(t *testing.T) {
 		reject  string   // reason the decoder rejects the example
 		encoded []byte   // re-encoded object (only if different from example encoding)
 		reasons []string // reasons for re-encode difference
-
-		// TODO: The cases with nonempty fixme are known to be not working and fixing them
-		// is an alpha criteria. They're present and skipped for visibility.
-		fixme string
 	}{
 		{
 			example: hex("00"),
@@ -558,10 +554,6 @@ func TestAppendixA(t *testing.T) {
 		},
 	} {
 		t.Run(fmt.Sprintf("%x", tc.example), func(t *testing.T) {
-			if tc.fixme != "" {
-				t.Skip(tc.fixme) // TODO: Remove once all cases are fixed.
-			}
-
 			var decoded interface{}
 			err := modes.Decode.Unmarshal(tc.example, &decoded)
 			if err != nil {

staging/src/k8s.io/apimachinery/pkg/runtime/serializer/cbor/internal/modes/decode_test.go

@@ -45,11 +45,6 @@ func TestDecode(t *testing.T) {
 		into          interface{} // prototype for concrete destination type. if nil, decode into empty interface value.
 		want          interface{}
 		assertOnError func(t *testing.T, e error)
-
-		// TODO: Some failing test cases are included for completeness. The next library
-		// minor version should allow them all to be fixed. In the meantime, this field
-		// explains the behavior reason for a particular failure.
-		fixme string
 	}
 
 	// Test cases are grouped by the kind of the CBOR data item being decoded, as enumerated in
@@ -70,13 +65,6 @@ func TestDecode(t *testing.T) {
 						}
 
 						t.Run(fmt.Sprintf("%s/mode=%s", test.name, modeName), func(t *testing.T) {
-							if test.fixme != "" {
-								// TODO: Remove this along with the
-								// fixme field when the last skipped
-								// test case is passing.
-								t.Skip(test.fixme)
-							}
-
 							var dst reflect.Value
 							if test.into == nil {
 								var i interface{}