Remove an unused dependency to bytes

[kit-ty-kate]

lwt hasn't been supporting OCaml < 4.02 for quite a long time

[raphael-proust]

Thanks!

I think the change should also include:

diff --git a/docs/Makefile b/docs/Makefile
index 5485ae43d..6fcaaa67c 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -2,7 +2,7 @@ BLD=../_build/default/src
 SRC=../src
 
 PKGS=\
-	-package bytes -package result \
+	-package result \
 	-package bigarray -package unix \
 	-package ocaml-migrate-parsetree -package ppx_tools_versioned \
 	-package react \

do you concur? I can take care of adding this and the CHANGES entry to the PR before merging.

[kit-ty-kate]

Yes indeed, though in this case ocamlfind is going to install a bytes package so it shouldn't matter. In the dune file it matters because bytes has stopped being a builtin with OCaml 5.0 (it only works because it relies on ocamlfind being installed via ocplib-endian)

Also I suspect this docs Makefile hasn't been run for a while (ppx_tools_versioned hasn't been updated since OCaml 4.11 i believe)

[raphael-proust]

The docs makefile was run not toooooo long ago (I made a special 4.13 switch, pinned a dedicated wikidoc package, and had to set up one or two more things). But I intend to remove it anyway in not too long.

I'll merge this PR after adding a CHANGES entry.