Moved all to videoio.go for portability

utils.go

@@ -1,19 +0,0 @@
-package main
-
-import (
-	"errors"
-	"os"
-)
-
-// Returns true if file exists, false otherwise.
-// https://stackoverflow.com/questions/12518876/how-to-check-if-a-file-exists-in-go
-func Exists(filename string) bool {
-	_, err := os.Stat(filename)
-	if err == nil {
-		return true
-	}
-	if errors.Is(err, os.ErrNotExist) {
-		return false
-	}
-	return false
-}