'fdl' vs. 'fdl-1.3': difference and/or redundant?

[Bernhard Voelker]

The 'fdl' module and its file 'doc/fdl.texi' contains version GFDL 1.3
since Nov 2008 [1][2].

Comparing it to the file 'doc/fdl-1.3.texi' of the 'fdl-1.3' module, there is 
still
this single difference:

  $ diff -u0 doc/fdl.texi doc/fdl-1.3.texi
  --- doc/fdl.texi      2019-06-23 11:00:48.274552884 +0200
  +++ doc/fdl-1.3.texi  2019-06-23 11:00:48.258552658 +0200
  @@ -417 +417 @@
  -@uref{https://www.gnu.org/copyleft/}.
  +@uref{https://www.gnu.org/licenses/}.

Fist of all, I consider this difference a bug in 'doc/fdl.texi', a remnant
from the older gfdl-1.2 text.

But once this would be fixed, then the whole 'fdl' module (or the 'fdl-1.3'
module?) seems to be redundant, doesn't it?
Couldn't we remove one of them?

[1] https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=2643a6d0df
[2] https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=e0a6737e87

Thanks & have a nice day,
Berny