ループ内の Go 構造体配列から要素を削除するときに「範囲外」エラーを回避するにはどうすればよいですか?

a = append(a[:i], a[i+1:]...)

a = a[:i+copy(a[i:], a[i+1:])]

// Your original loop with the issue:
// for i, application := range config.Applications {
//   if i == 1 {
//     config.Applications = _removeApplication(i, config.Applications)
//   }
// }

// Corrected code using downward loop:
for i := len(config.Applications) - 1; i >= 0; i-- {
    application := config.Applications[i]
    // Condition to decide if current element has to be deleted:
    if haveToDelete {
        config.Applications = append(config.Applications[:i],
                config.Applications[i+1:]...)
    }
}