Revert: remove reparsing of longident to index modules in paths · ocaml/merlin@79594e9

The job was canceled because "merge_branch" failed.

The operation was canceled.

An error has been caught in some system package index files, so the system package index files have been re-synchronised, and the system package installation has been retried: the process '/opt/hostedtoolcache/opam/2.1.6/x86_64/opam' failed with exit code 20