repl: remove deprecated repl.turnOffEditorMode() function

This function is deprecated for multiple years and provides very
little benefit to users. Thus, it's removed to improve the
maintainability of the REPL module.

Signed-off-by: Ruben Bridgewater <ruben@bridgewater.de>

PR-URL: #33286
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: BridgeAR

doc/api/deprecations.md

@@ -1628,12 +1628,15 @@ supported API.
 ### DEP0078: `REPLServer.turnOffEditorMode()`
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/33286
+    description: End-of-Life.
   - version: v9.0.0
     pr-url: https://github.com/nodejs/node/pull/15136
     description: Runtime deprecation.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
 `REPLServer.turnOffEditorMode()` was removed from userland visibility.
 

lib/repl.js

@@ -1034,11 +1034,6 @@ REPLServer.prototype.setPrompt = function setPrompt(prompt) {
   Interface.prototype.setPrompt.call(this, prompt);
 };
 
-REPLServer.prototype.turnOffEditorMode = deprecate(
-  function() { _turnOffEditorMode(this); },
-  'REPLServer.turnOffEditorMode() is deprecated',
-  'DEP0078');
-
 const requireRE = /\brequire\s*\(\s*['"`](([\w@./-]+\/)?(?:[\w@./-]*))(?![^'"`])$/;
 const fsAutoCompleteRE = /fs(?:\.promises)?\.\s*[a-z][a-zA-Z]+\(\s*["'](.*)/;
 const simpleExpressionRE =