package/siproxd: remove license file hash for internal libltdl
In a first draft of what ended up in commit 3efc5a250c1c
("package/siproxd: new package") libltdl was optionally built from an
internal copy of siproxd. Now external libltdl is selected
unconditionally, thus the license file of the internal copy of libtool
does not apply anymore.
Signed-off-by: Alexander Dahl <post@lespocky.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>