fix warnings

src/client/bounded_queue.ml

@@ -3,8 +3,6 @@
     After the high watermark is reached, pushing items into the queue will
     instead discard them. *)
 
-open Common_
-
 exception Closed
 (** Raised when pushing into a closed queue *)
 

src/client/bounded_queue_sync.ml

@@ -43,11 +43,6 @@ end = struct
     UM.protect self.mutex @@ fun () ->
     if not self.closed then self.closed <- true
 
-  let push (self : _ t) x : unit =
-    UM.protect self.mutex @@ fun () ->
-    if self.closed then raise Closed;
-    Queue.push x self.q
-
   let try_pop (self : 'a t) : 'a option =
     UM.protect self.mutex @@ fun () ->
     if self.closed then raise Closed;

src/client/export_error.ml

@@ -1,5 +1,3 @@
-open Common_
-
 type t =
   [ `Status of int * Opentelemetry.Proto.Status.status
   | `Failure of string

src/client/notifier_sync.ml

@@ -11,8 +11,6 @@ let trigger self = Condition.signal self.cond
 
 let delete = ignore
 
-let[@inline] protect self f = Util_mutex.protect self.mutex f
-
 let wait self =
   Mutex.lock self.mutex;
   Condition.wait self.cond self.mutex;