Make suspend-frame (C-x C-z) not try to suspend graphical emacs

It was hard to get out of and not helpful anyways

.emacs.d/init.el

@@ -230,6 +230,14 @@
           (graphviz-dot-indent-line))
       (delete-horizontal-space))))
 
+(use-package frame
+  :config
+  (defun suspend-frame ()
+    "If running in a secondary tty, call `suspend-tty', else nop"
+    (interactive)
+    (when (eq (framep (selected-frame)) t)
+        (suspend-tty))))
+
 ;;;; external packages (required)
 (use-package company :ensure
   :config