chore: golint compliant

Author: pchampio

glfw.go

@@ -210,9 +210,8 @@ func (m *windowManager) glfwRefreshCallback(window *glfw.Window) {
 	if width == 0 {
 		fmt.Println("go-flutter: Cannot calculate pixelsPerScreenCoordinate for zero-width window.")
 		return
-	} else {
-		m.pixelsPerScreenCoordinate = float64(widthPx) / float64(width)
 	}
+	m.pixelsPerScreenCoordinate = float64(widthPx) / float64(width)
 
 	var pixelRatio float64
 	if m.forcedPixelRatio != 0 {