Update password-store +auth to only use auth-source-pass

Now that auth-password-store has been renamed to auth-source-pass and it matches
the same feature included in emacs 26 under the same name we don't need custom
checks and package loading.

modules/tools/password-store/autoload.el

@@ -12,9 +12,7 @@
 
 ;;;###autoload
 (defalias '+pass--get-entry
-  (if (featurep 'auth-store-pass)
-      #'auth-source-pass-parse-entry
-    #'auth-pass-parse-entry))
+  #'auth-source-pass-parse-entry)
 
 ;;;###autoload
 (defun +pass-get-field (entry fields)

modules/tools/password-store/config.el

@@ -36,8 +36,6 @@
 
 
 ;; Is built into Emacs 26+
-(when (featurep! +auth)
-  (if (require 'auth-store-pass nil t)
-      (auth-source-pass-enable)
-    (def-package! auth-source-store
-      :config (auth-source-pass-enable))))
+(def-package! auth-source-pass
+  :when (featurep! +auth)
+  :config (auth-source-pass-enable))

modules/tools/password-store/packages.el

@@ -3,7 +3,9 @@
 
 (package! pass)
 (package! password-store)
-(package! auth-source-pass)
+
+(when (featurep! +auth)
+  (package! auth-source-pass))
 
 (when (featurep! :completion helm)
   (package! helm-pass))