io/router: remove unnecessary panics while routing key ops

Signed-off-by: Pierre Curto <pierre.curto@gmail.com>

io/router/key.go

@@ -3,7 +3,6 @@
 package router
 
 import (
-	"gioui.org/internal/ops"
 	"gioui.org/io/event"
 	"gioui.org/io/key"
 )
@@ -130,34 +129,6 @@ func (k *keyCollector) inputOp(op key.InputOp) {
 	h.hint = op.Hint
 }
 
-func decodeKeyInputOp(d []byte, refs []interface{}) key.InputOp {
-	if ops.OpType(d[0]) != ops.TypeKeyInput {
-		panic("invalid op")
-	}
-	return key.InputOp{
-		Tag:  refs[0].(event.Tag),
-		Hint: key.InputHint(d[1]),
-	}
-}
-
-func decodeSoftKeyboardOp(d []byte, refs []interface{}) key.SoftKeyboardOp {
-	if ops.OpType(d[0]) != ops.TypeKeySoftKeyboard {
-		panic("invalid op")
-	}
-	return key.SoftKeyboardOp{
-		Show: d[1] != 0,
-	}
-}
-
-func decodeFocusOp(d []byte, refs []interface{}) key.FocusOp {
-	if ops.OpType(d[0]) != ops.TypeKeyFocus {
-		panic("invalid op")
-	}
-	return key.FocusOp{
-		Tag: refs[0],
-	}
-}
-
 func (t TextInputState) String() string {
 	switch t {
 	case TextInputKeep: