remove certificate from keychaine ios swift

I want to remove certificate from keychaine using:

let removeKeyQuery: [String: Any] = [kSecClass as String: kSecClassKey,
            kSecAttrLabel as String: "serverCertificate"]
        let status = SecItemDelete(removeKeyQuery as CFDictionary)

I get the error errSecItemNotFound.

And when I try to save it using:

let getquery: [String: Any] = [kSecClass as String: kSecClassCertificate,
            kSecAttrLabel as String: "serverCertificate",
            kSecReturnRef as String: kCFBooleanTrue]
        var item: CFTypeRef?
        let status = SecItemCopyMatching(getquery as CFDictionary, &item)
        guard status == errSecSuccess else { print("Certificate not found")
            return nil
        }
        let certificate = item as! SecCertificate

I get errSecSuccess and i get the certificate.