ebiten: update GeoM.Rotate() comment (#3106)

geom.go

@@ -121,7 +121,7 @@ func (g *GeoM) Translate(tx, ty float64) {
 	g.ty += ty
 }
 
-// Rotate rotates the matrix by theta.
+// Rotate rotates the matrix clockwise by theta.
 // The unit is radian.
 func (g *GeoM) Rotate(theta float64) {
 	if theta == 0 {

internal/ui/context.go

@@ -196,7 +196,6 @@ func (c *context) swapBuffersOrWait(needsSwapBuffers bool, graphicsDriver graphi
 	}
 	if waitTime > 0 {
 		if delta := waitTime - now.Sub(c.lastSwapBufferTime); delta > 0 {
-			println(waitTime.String(), now.Sub(c.lastSwapBufferTime).String())
 			time.Sleep(delta)
 		}
 	}