Revert "monaco_editor: abort pending checkPythonSourceCode requests"

This reverts commit 93d60201.

bt5/erp5_monaco_editor/SkinTemplateItem/portal_skins/erp5_monaco_editor/monaco_editor_support.zpt

@@ -107,22 +107,6 @@ $script.onload = function() {
   }
 
   var timeout = null;
-
-  // minimal pollyfil for AbortController
-  if (self.AbortController === undefined) {
-    class AbortController {
-      constructor() {
-        this.signal = { aborted: false };
-      }
-      abort() {
-        this.signal.aborted = true;
-      }
-    }
-    console.log("AbortController not available");
-    self.AbortController = AbortController;
-  }
-  var controller = new AbortController();
-
   function checkPythonSourceCode() {
     const data = new FormData();
     const checker_parameters = {
@@ -139,8 +123,7 @@ $script.onload = function() {
     data.append("data", JSON.stringify(checker_parameters));
     fetch(portal_url + "/ERP5Site_checkPythonSourceCodeAsJSON", {
       method: "POST",
-      body: data,
-      signal: controller.signal
+      body: data
     })
       .then(response => response.json())
       .then(data => {
@@ -162,12 +145,7 @@ $script.onload = function() {
           })
         );
         timeout = null;
-      }, e => {
-        if (!e instanceof DOMException /* AbortError */ ) {
-          throw e;
-        }
-        /* ignore aborted requests */
-    });
+      });
   }
 
   editor.model.onDidChangeContent(event => {
@@ -175,8 +153,6 @@ $script.onload = function() {
     changed = true; /* global variable used in erp5.js for onbeforeunload event */
     if (mode == "python") {
       // debounced `checkPythonSourceCode`
-      controller.abort();
-      controller = new AbortController();
       if (timeout) {
         clearTimeout(timeout);
       }