get rid of INLINE_FILE_TAG constant

get rid of INLINE_FILE_TAG constant

Now that the whole inline logic has been converted to using bool flags,
the INLINE_FILE_TAG constant is not useful anymore.

Get rid of the constant as it's now unused and to prevent any future
developer from mistakenly use it again.

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: David Sommerseth <davids@openvpn.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20200508212356.18522-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg19863.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>