diff --git a/doc/api/editorInfo.md b/doc/api/editorInfo.md
index 5a8551eba..834f5ac3c 100644
--- a/doc/api/editorInfo.md
+++ b/doc/api/editorInfo.md
@@ -29,9 +29,6 @@ Returns the `rep` object.
 ## editorInfo.ace_applyPreparedChangesetToBase()
 ## editorInfo.ace_setUserChangeNotificationCallback(f)
 ## editorInfo.ace_setAuthorInfo(author, info)
-## editorInfo.ace_setAuthorSelectionRange(author, start, end)
-## editorInfo.ace_getUnhandledErrors()
-## editorInfo.ace_getDebugProperty(prop)
 ## editorInfo.ace_fastIncorp(?)
 ## editorInfo.ace_isCaret(?)
 ## editorInfo.ace_getLineAndCharForPoint(?)
diff --git a/src/static/js/ace.js b/src/static/js/ace.js
index efb38077f..b0a042570 100644
--- a/src/static/js/ace.js
+++ b/src/static/js/ace.js
@@ -120,7 +120,6 @@ const Ace2Editor = function () {
     'applyPreparedChangesetToBase',
     'setUserChangeNotificationCallback',
     'setAuthorInfo',
-    'setAuthorSelectionRange',
     'callWithAce',
     'execCommand',
     'replaceRange',
@@ -137,8 +136,6 @@ const Ace2Editor = function () {
 
   this.exportText = () => loaded ? info.ace_exportText() : '(awaiting init)\n';
 
-  this.getDebugProperty = (prop) => info.ace_getDebugProperty(prop);
-
   this.getInInternationalComposition =
       () => loaded ? info.ace_getInInternationalComposition() : null;
 
@@ -152,9 +149,6 @@ const Ace2Editor = function () {
   // changes, and modify the changeset to be applied by applyPreparedChangesetToBase accordingly.
   this.prepareUserChangeset = () => loaded ? info.ace_prepareUserChangeset() : null;
 
-  // returns array of {error: <browser Error object>, time: +new Date()}
-  this.getUnhandledErrors = () => loaded ? info.ace_getUnhandledErrors() : [];
-
   const addStyleTagsFor = (doc, files) => {
     for (const file of files) {
       const link = doc.createElement('link');
diff --git a/src/static/js/ace2_inner.js b/src/static/js/ace2_inner.js
index 4672751dc..675427019 100644
--- a/src/static/js/ace2_inner.js
+++ b/src/static/js/ace2_inner.js
@@ -50,8 +50,6 @@ function Ace2Inner(editorInfo, cssManagers) {
   const FORMATTING_STYLES = ['bold', 'italic', 'underline', 'strikethrough'];
   const SELECT_BUTTON_CLASS = 'selected';
 
-  const caughtErrors = [];
-
   let thisAuthor = '';
 
   let disposed = false;
@@ -375,13 +373,6 @@ function Ace2Inner(editorInfo, cssManagers) {
       });
 
       cleanExit = true;
-    } catch (e) {
-      caughtErrors.push(
-          {
-            error: e,
-            time: +new Date(),
-          });
-      throw e;
     } finally {
       const cs = currentCallStack;
       if (cleanExit) {
@@ -695,28 +686,9 @@ function Ace2Inner(editorInfo, cssManagers) {
   editorInfo.ace_setAuthorInfo = (author, info) => {
     setAuthorInfo(author, info);
   };
-  editorInfo.ace_setAuthorSelectionRange = (author, start, end) => {
-    changesetTracker.setAuthorSelectionRange(author, start, end);
-  };
-
-  editorInfo.ace_getUnhandledErrors = () => caughtErrors.slice();
 
   editorInfo.ace_getDocument = () => document;
 
-  editorInfo.ace_getDebugProperty = (prop) => {
-    if (prop === 'debugger') {
-      // obfuscate "eval" so as not to scare yuicompressor
-      window['ev' + 'al']('debugger');
-    } else if (prop === 'rep') {
-      return rep;
-    } else if (prop === 'window') {
-      return window;
-    } else if (prop === 'document') {
-      return document;
-    }
-    return undefined;
-  };
-
   const now = () => Date.now();
 
   const newTimeLimit = (ms) => {