remove redundant CenterPad layout

ui/layouts/centerpadlayout.go

@@ -1,39 +0,0 @@
-package layouts
-
-import (
-	"fyne.io/fyne/v2"
-)
-
-var _ fyne.Layout = (*CenterPadLayout)(nil)
-
-type CenterPadLayout struct {
-	PadLeftRight float32
-	PadTopBottom float32
-}
-
-// only supports one object
-func (c *CenterPadLayout) MinSize(objects []fyne.CanvasObject) fyne.Size {
-	if len(objects) == 0 {
-		return fyne.NewSize(0, 0)
-	}
-	return fyne.Size{
-		Width:  objects[0].MinSize().Width + c.PadLeftRight*2,
-		Height: objects[0].MinSize().Height + c.PadTopBottom*2,
-	}
-}
-
-func (c *CenterPadLayout) Layout(objects []fyne.CanvasObject, size fyne.Size) {
-	if len(objects) == 0 {
-		return
-	}
-	objSize := objects[0].MinSize()
-	xOffs := (size.Width - objSize.Width) / 2
-	yOffs := (size.Height - objSize.Height) / 2
-	for _, child := range objects {
-		if !child.Visible() {
-			continue
-		}
-		child.Move(fyne.NewPos(xOffs, yOffs))
-		child.Resize(child.MinSize())
-	}
-}