diff --git a/taskfile/defer.go b/taskfile/defer.go
deleted file mode 100644
index 5787fac2..00000000
--- a/taskfile/defer.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package taskfile
-
-// Defer is the parameters to a defer operation.
-// It can be exactly one of:
-// - A string command
-// - A task call
-type Defer struct {
-	Cmd  string
-	Call *Call
-}
-
-// isValid returns true when Defer describes a valid action.
-// In order for a Defer to be valid, one of Cmd or Call.Task
-// must be non-empty.
-func (d *Defer) isValid() bool {
-	return d.Cmd != "" || (d.Call != nil && d.Call.Task != "")
-}
-
-// UnmarshalYAML implements yaml.Unmarshaler interface
-func (d *Defer) UnmarshalYAML(unmarshal func(interface{}) error) error {
-	var cmd string
-	if err := unmarshal(&cmd); err == nil {
-		d.Cmd = cmd
-		return nil
-	}
-	var taskCall struct {
-		Task string
-		Vars *Vars
-	}
-	if err := unmarshal(&taskCall); err != nil {
-		return err
-	}
-	d.Call = &Call{
-		Task: taskCall.Task,
-		Vars: taskCall.Vars,
-	}
-	return nil
-}