Remove unused YAML tags and GetYAML/SetYAML methods

Unneeded after move to ghodss/yaml.

pkg/util/time.go

@@ -79,35 +79,3 @@ func (t Time) MarshalJSON() ([]byte, error) {
 
 	return json.Marshal(t.Format(time.RFC3339))
 }
-
-// SetYAML implements the yaml.Setter interface.
-func (t *Time) SetYAML(tag string, value interface{}) bool {
-	if value == nil {
-		t.Time = time.Time{}
-		return true
-	}
-
-	str, ok := value.(string)
-	if !ok {
-		return false
-	}
-
-	pt, err := time.Parse(time.RFC3339, str)
-	if err != nil {
-		return false
-	}
-
-	t.Time = pt
-	return true
-}
-
-// GetYAML implements the yaml.Getter interface.
-func (t Time) GetYAML() (tag string, value interface{}) {
-	if t.IsZero() {
-		value = "null"
-		return
-	}
-
-	value = t.Format(time.RFC3339)
-	return tag, value
-}