gnu: Avoid circular dependency among modules.

Reported by Alex Kost <alezost@gmail.com>.

* gnu/packages/python.scm: Don't use #:select for (gnu packages zip).

gnu/packages/python.scm

@@ -37,7 +37,7 @@ (define-module (gnu packages python)
   #:use-module (gnu packages elf)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages sqlite)
-  #:use-module ((gnu packages zip) #:select (unzip))
+  #:use-module (gnu packages zip)
   #:use-module (gnu packages multiprecision)
   #:use-module (guix packages)
   #:use-module (guix download)