Cleanup references to cider-package-version

Author: bbatsov

cider-util.el

@@ -389,7 +389,6 @@ propertized (defaults to current buffer)."
       (color-lighten-name color (if darkp 5 -5)))))
 
 (defvar cider-version)
-(defvar cider-package-version)
 (defvar cider-codename)
 
 (defun cider--version ()

cider.el

@@ -96,11 +96,6 @@
 (defconst cider-version "1.2.0"
   "The current version of CIDER.")
 
-(defvar cider-package-version
-  ;; package-get-version was added in Emacs 27
-
-  "The version of the currently installed CIDER package.")
-
 (defconst cider-codename "Nice"
   "Codename used to denote stable releases.")