Revert for the fix for the 'Bug#23593091: MYSQL SERVER MSI - REGISTRY ITEMS LEFT BEHIND WHEN > 1 SERVER VERSION INSTALLED'

The Server Installer needs some changes to accomodate for this fix so it got postponed for the next release.

Author: Piotr Obrzut

packaging/WiX/mysql_server_extra.wxs.in

@@ -69,7 +69,7 @@
       <RegistryKey
         Id='MySQLKey'
         Root='HKLM'
-        Key='SOFTWARE\MySQL AB\@PRODUCT_NAME@ @MAJOR_VERSION@.@MINOR_VERSION@'
+        Key='SOFTWARE\MySQL AB\[ProductName]'
         Action='createAndRemoveOnUninstall'>
         <RegistryValue
           Type='string'