nongnu: nvidia: Deprecate replace-mesa.

* nongnu/packages/nvidia.scm (mesa/fake,mesa/fake-beta): Delete variables.
(replace-mesa): Deprecate.

nongnu/packages/nvidia.scm

@@ -842,19 +842,8 @@ variables @code{__GLX_VENDOR_LIBRARY_NAME=nvidia} and
       (package-propagated-inputs nvidia-driver-beta)))
     (inputs (list mesa-for-nvda nvidia-driver-beta))))
 
-(define mesa/fake
-  (package
-    (inherit mesa)
-    (replacement nvda)))
-
-(define-public mesa/fake-beta
-  (hidden-package
-   (package
-     (inherit mesa)
-     (replacement nvdb))))
-
-(define-public replace-mesa
-  (package-input-rewriting `((,mesa . ,mesa/fake))))
+(define-deprecated/public-alias replace-mesa
+  (package-input-grafting (list (cons mesa nvda))))
 
 
 ;;;