Revert "Updated Dutch translation 3.14"

This reverts commit 7c5ae5f163725db6bd61430da6fc27bce86faa43 because it
breaks distcheck:

Merging translations into gnome-boxes-search-provider.ini.
org.gnome.Boxes.desktop: error: value "virtual machine;vm;virtuele
machine" for locale string list key "Keywords[nl]" in group "Desktop
Entry" does not have a semicolon (';') as trailing character
Makefile:951: recipe for target 'all-local' failed
Update 3.14.2 release notes