Revert "ocamlbuild.0.10.0"

[samoht]

Reverts #8155

[camelus]

✅ No new or changed opam files 37f9c2e

---

✅ Installability check (5893 → 5892)

• removed installable packages (1): ocamlbuild.0.10.0

[samoht]

Reverting as it breaks mtime builds:

#=== ERROR while installing mtime.0.8.3 =======================================#
# opam-version 1.2.2
# os           linux
# command      ocaml pkg/build.ml native=true native-dynlink=true jsoo=false
# path         /home/travis/.opam/4.03.0/build/mtime.0.8.3
# compiler     4.03.0
# exit-code    10
# env-file     /home/travis/.opam/4.03.0/build/mtime.0.8.3/mtime-24235-865888.env
# stdout-file  /home/travis/.opam/4.03.0/build/mtime.0.8.3/mtime-24235-865888.out
# stderr-file  /home/travis/.opam/4.03.0/build/mtime.0.8.3/mtime-24235-865888.err
### stdout ###
# [...]
# ocamlfind ocamlopt -a -cclib -lmtime_stubs -cclib -lrt src-os/mtime_base.cmx src-os/mtime.cmx -o src-os/mtime.cmxa
# ocamlfind ocamlc -c -g -bin-annot -safe-string -I src-os -o src-os/mtime.cmo src-os/mtime.ml
# ocamlfind ocamlc -a -dllib -lmtime_stubs -cclib -lrt src-os/mtime_base.cmo src-os/mtime.cmo -o src-os/mtime.cma
# ocamlfind ocamlopt -shared -linkall src-os/libmtime_stubs.a src-os/mtime.cmxa -o src-os/mtime.cmxs
# + ocamlfind ocamlopt -shared -linkall src-os/libmtime_stubs.a src-os/mtime.cmxa -o src-os/mtime.cmxs
# /usr/bin/ld: cannot find -lmtime_stubs
# collect2: ld returned 1 exit status
# File "caml_startup", line 1:
# Error: Error during linking
# Command exited with code 2.

I reproduced it locally on 4.03, need to investigate a bit more. /cc @gasche and @dbuenzli

[samoht]

Same issue on 4.04.