Remove jupyter-last-sent-request

jupyter-client.el

@@ -461,10 +461,6 @@ response to the sent message, see `jupyter-add-callback' and
 (cl-defmethod jupyter-send ((type string) &rest content)
   (jupyter-send jupyter-current-client type content))
 
-(defsubst jupyter-last-sent-request (client)
-  "Return the most recent `jupyter-request' made by CLIENT."
-  (gethash "last-sent" (oref client requests)))
-
 ;;; Starting communication with a kernel
 
 (cl-defmethod jupyter-alive-p ((client jupyter-kernel-client) &optional channel)

test/jupyter-test.el

@@ -2145,7 +2145,7 @@ print(\"foo\", flush=True)
    (org-babel-previous-src-block)
    (org-babel-execute-src-block)
    (with-current-buffer (org-babel-initiate-session)
-     (jupyter-wait-until-idle (jupyter-last-sent-request jupyter-current-client)))
+     (sleep-for 1))
    (org-back-to-heading)
    (org-down-element)
    (should (eq (org-element-type (org-element-context)) 'plain-list))

test/test-helper.el

@@ -503,10 +503,9 @@ results instead of an equality match."
       (save-window-excursion
         (org-babel-execute-src-block nil info)
         (when (equal (alist-get :async args) "yes")
-          (jupyter-idle-sync
-           (jupyter-last-sent-request
-            (jupyter-org-test-client-from-info info)))))
-      (org-with-point-at (org-babel-where-is-src-block-result nil info)
+          ;; Add a delay to try and ensure the last request of the
+          ;; client has been completed.
+          (sleep-for 0.2))
         (let ((element (org-element-context)))
           ;; Handle empty results with just a RESULTS keyword
           ;;