Lint fixes and testing workflow actions

pkg/whatsapp/businessapi/client.go

@@ -340,15 +340,3 @@ func jidToPhoneNumber(jid types.JID) string {
 
 	return phone
 }
-
-// phoneNumberToJID converts an E.164 phone number to WhatsApp JID
-func phoneNumberToJID(phoneNumber string) types.JID {
-	// Remove + if present
-	phone := strings.TrimPrefix(phoneNumber, "+")
-
-	// Create JID
-	return types.JID{
-		User:   phone,
-		Server: types.DefaultUserServer, // "s.whatsapp.net"
-	}
-}