gnu: readline: Remove obsolete post-install phase.

The 'strip' phase does this unconditionally now.

* gnu/packages/readline.scm (readline)[arguments]<#:phases>: Remove.

gnu/packages/readline.scm

@@ -50,17 +50,6 @@
    (3 "1027kmymniizcy0zbdlrczxfx3clxcdln5yq05q9yzlc6y9slhwy")))
 
 (define-public readline
-  (let ((post-install-phase
-         '(lambda* (#:key outputs #:allow-other-keys)
-            (let* ((out (assoc-ref outputs "out"))
-                   (lib (string-append out "/lib")))
-              ;; Make libraries writable so that `strip' can work.
-              ;; Failing to do that, it bails out with "Permission
-              ;; denied".
-              (for-each (lambda (f) (chmod f #o755))
-                        (find-files lib "\\.so"))
-              (for-each (lambda (f) (chmod f #o644))
-                        (find-files lib "\\.a"))))))
   (package
     (name "readline")
     (version (string-append "7.0."
@@ -98,11 +87,7 @@
                        ;; some SIG_* #defined in _POSIX
                        '(#:make-flags '("TERMCAP_LIB=-lncurses"
                                         "CPPFLAGS=-D_POSIX -D'chown(f,o,g)=0'"))
-                         '())
-                   #:phases (alist-cons-after
-                             'install 'post-install
-                             ,post-install-phase
-                             %standard-phases)))
+                       '())))
     (synopsis "Edit command lines while typing, with history support")
     (description
      "The GNU readline library allows users to edit command lines as they
@@ -111,7 +96,7 @@ commands, letting you easily recall, edit and re-enter past commands.  It
 features both Emacs-like and vi-like keybindings, making its usage
 comfortable for anyone.")
     (license gpl3+)
-      (home-page "https://savannah.gnu.org/projects/readline/"))))
+    (home-page "https://savannah.gnu.org/projects/readline/")))
 
 (define-public readline-6.2
   (package (inherit readline)