refactor(engine): remove unused imports (#7437)

Signed-off-by: Rudi Grinberg <[email protected]>

src/dune_engine/dune

@@ -10,13 +10,8 @@
   dune_console
   dyn
   fiber
-  incremental_cycles
-  dag
   memo
-  ocaml
-  dune_re
   threads.posix
-  opam_file_format
   dune_lang
   dune_cache
   dune_cache_storage
@@ -26,7 +21,6 @@
   dune_action_plugin
   dune_util
   build_path_prefix_map
-  dune_section
   csexp_rpc
   dune_rpc_private
   dune_rpc_server
@@ -36,10 +30,8 @@
   ocamlc_loc
   dune_file_watcher
   dune_filesystem_stubs
-  ocaml_inotify
   dune_digest
-  dune_metrics
-  async_inotify_for_dune)
+  dune_metrics)
  (synopsis "Internal Dune library, do not use!")
  (instrumentation
   (backend bisect_ppx)))

src/dune_engine/import.ml

@@ -3,15 +3,12 @@ module Digest = Dune_digest
 module Console = Dune_console
 module Metrics = Dune_metrics
 module Log = Dune_util.Log
-module Re = Dune_re
 module Stringlike = Dune_util.Stringlike
 module Stringlike_intf = Dune_util.Stringlike_intf
 module Persistent = Dune_util.Persistent
-module Value = Dune_util.Value
 module Config = Dune_util.Config
 module Predicate_lang = Dune_lang.Predicate_lang
 module String_with_vars = Dune_lang.String_with_vars
-module Pform = Dune_lang.Pform
 module Glob = Dune_lang.Glob
 module Outputs = Dune_lang.Action.Outputs
 module Inputs = Dune_lang.Action.Inputs