Remove explicit OCaml transitive dependency files

Compute transitive module dependency closures directly from anonymous
ocamldep and ocamlobjinfo actions instead of materializing .all-deps
files. This removes the merge-file rule path for internal dependency
setup while preserving module-level cycle diagnostics.

As a side-effect, this fixes an ugly "Rule not found" error.

Signed-off-by: Rudi Grinberg <me@rgrinberg.com>

Author: rgrinberg

otherlibs/stdune/src/filename.ml

@@ -37,7 +37,6 @@ module Extension = struct
   let cmsi = ".cmsi"
   let odoc = ".odoc"
   let d = ".d"
-  let all_deps = ".all-deps"
   let js = ".js"
   let h = ".h"
   let mlg = ".mlg"

otherlibs/stdune/src/filename.mli

@@ -53,7 +53,6 @@ module Extension : sig
   val odoc : t
   val h : t
   val d : t
-  val all_deps : t
   val js : t
   val mlg : t
   val json : t

src/dune_graph/graph.ml

@@ -220,17 +220,9 @@ module String_opt_map = Map.Make (struct
 
 let serialize_summary t oc =
   let open Aggregated in
-  (* CR-someday cmoseley: A memo node is created for each *.all-deps target
-     which fills up the summary with noise. This is a hacky fix for it right
-     now, it would be better to find something else to aggregate on or to move
-     these nodes to a single table since they only have a single entry each *)
-  let rename_all_deps label =
-    Option.map label ~f:(fun label ->
-      if String.ends_with ~suffix:".all-deps" label then "*.all-deps" else label)
-  in
   let by_label =
     Int.Map.fold t.nodes ~init:String_opt_map.empty ~f:(fun node acc ->
-      let label = rename_all_deps node.label in
+      let label = node.label in
       let attributes =
         Option.value
           ~default:Int.Map.empty
@@ -253,7 +245,7 @@ let serialize_summary t oc =
   let by_label =
     Edge.Set.fold t.edges ~init:by_label ~f:(fun edge acc ->
       let get_label id =
-        Option.bind (Int.Map.find t.nodes id) ~f:(fun node -> rename_all_deps node.label)
+        Option.bind (Int.Map.find t.nodes id) ~f:(fun node -> node.label)
       in
       let src_label = get_label edge.src_id in
       let dst_label = get_label edge.dst_id in