This package creates ${LOCALBASE}/share/applications directory, but it
didn't attempt to remove it upon deinstallation. DEINSTALL fragment has
been updated to fix this.
This avoids the need for a confusing line of the form:
DEINSTALL_TEMPLATE+= path/to/INSTALL
in the package Makefile, and actually removes the need to specify it
altogether since by convention, the existence of the DEINSTALL script
is enough to add it to DEINSTALL_TEMPLATE.