tr: remove unused DriverHandle interface

was causing typed nil interface panics and served no purpose

client/allocrunner/taskrunner/interfaces/handle.go

@@ -1,45 +1,9 @@
 package interfaces
 
 import (
-	"context"
 	"time"
-
-	cstructs "github.com/hashicorp/nomad/client/structs"
-	"github.com/hashicorp/nomad/nomad/structs"
-	"github.com/hashicorp/nomad/plugins/drivers"
 )
 
-// DriverHandle wraps operations to a driver such that they are operated on a specific
-// task
-type DriverHandle interface {
-	// ID returns the task ID
-	ID() string
-
-	// WaitCh is used to return a channel used to wait for task completion
-	WaitCh(context.Context) (<-chan *drivers.ExitResult, error)
-
-	// Update is used to update the task if possible and update task related
-	// configurations.
-	Update(task *structs.Task) error
-
-	// Kill is used to stop the task
-	Kill() error
-
-	// Stats returns aggregated stats of the driver
-	Stats() (*cstructs.TaskResourceUsage, error)
-
-	// Signal is used to send a signal to the task
-	Signal(s string) error
-
-	// ScriptExecutor is an interface used to execute commands such as
-	// health check scripts in the a DriverHandle's context.
-	ScriptExecutor
-
-	// Network returns the driver's network or nil if the driver did not
-	// create a network.
-	Network() *cstructs.DriverNetwork
-}
-
 // ScriptExecutor is an interface that supports Exec()ing commands in the
 // driver's context. Split out of DriverHandle to ease testing.
 type ScriptExecutor interface {