remove compatibility layer

IPython/html/static/services/kernels/js/kernel.js

@@ -269,11 +269,6 b' var IPython = (function (IPython) {'
         return;
     };
 
-    Kernel.prototype.object_info_request = function(objname, callback){
-        console.log('Warning object_info_request is deprecated, use object_info')
-        return this.object_info(objname, callback.shell.reply)
-    }
-
     /**
      * Execute given code into kernel, and pass result to callback.
      *

docs/source/whatsnew/pr/object_info_js.rst

@@ -1,4 +1,2 b''
 * ``object_info_request`` as been replaced by ``object_info`` for consistency in the javascript API.
   ``object_info`` as a simpler interface to register callback that is incompatible with ``object_info_request``.
-  a shim that print a deprecation warning in js console as been added for the time beeing but will be removed 
-  in future version.