This was added in a37ff8d. Per the commit message, php_uname() in a
Windows server can sometimes return the string using encondings other
than ISO-8859-1 and thus utf8_encode() was added. The problem is that
utf8_encode() only converts from ISO-8859-1 to UTF-8 so it does not work
for the purpose that it was added and it was deprecated in PHP 8.2.
Removing it seems safe. If we start having problems with character
encoding in the string that we are sending to Helpscout, we can consider
other alternatives to make sure the string is always send using UTF-8.
[MAILPOET-4865]
19028eee3d