Remove ess-R-object-popup from ess layer.

As described in issue syl20bnr#9464, this package was removed from melpa for
not having a GPL compatible license and is causing an error every time
spacemacs starts.

Continuation of commit 8c3cf7c

layers/+lang/ess/README.org

@@ -44,11 +44,10 @@ Send code to inferior process with these commands:
 ** Helpers
 Helpers for inspecting objects at point are available in R buffers only.
 
-| Key Binding | Description                                                         |
-|-------------+---------------------------------------------------------------------|
-| ~SPC m h d~ | view data under point using [ess-R-data-view][ess-R-data-view]      |
-| ~SPC m h i~ | object introspection popup [ess-R-object-popup][ess-R-object-popup] |
-| ~SPC m h t~ | view table using [ess-R-data-view][ess-R-data-view]                 |
+| Key Binding | Description                                                    |
+|-------------+----------------------------------------------------------------|
+| ~SPC m h d~ | view data under point using [ess-R-data-view][ess-R-data-view] |
+| ~SPC m h t~ | view table using [ess-R-data-view][ess-R-data-view]            |
 
 * Options
 =ess-smart-equals= is disabled by default. In order to enable it, set in your

layers/+lang/ess/packages.el

@@ -103,7 +103,6 @@
       "st" 'ess-eval-function
       ;; R helpers
       "hd" 'ess-R-dv-pprint
-      "hi" 'ess-R-object-popup
       "ht" 'ess-R-dv-ctable
       )
     (define-key ess-mode-map (kbd "<s-return>") 'ess-eval-line)
@@ -112,8 +111,6 @@
 
 (defun ess/init-ess-R-data-view ())
 
-(defun ess/init-ess-R-object-popup ())
-
 (defun ess/init-ess-smart-equals ()
   (use-package ess-smart-equals
     :defer t