Reattach of.by to the Belarus ccTLD block (publicsuffix#1995)

This is only merging two blocks, i.e. removing an empty line.

of.by is in the same situation as com.by: not officially reserved
according to available documentation, but third-level domain
registrations are available as if it were. Logically it belongs
in the same block as com.by.

public_suffix_list.dat

@@ -675,7 +675,6 @@ mil.by
 // second-level domain, but it's being used as one (see www.google.com.by and
 // www.yahoo.com.by, for example), so we list it here for safety's sake.
 com.by
-
 // http://hoster.by/
 of.by