store: Remove unused variable and 'socket' call.

* guix/store.scm (open-inet-socket): Remove unused 'sock' variable.

guix/store.scm

@@ -471,9 +471,6 @@
 (define (open-inet-socket host port)
   "Connect to the Unix-domain socket at HOST:PORT and return it.  Raise a
 '&store-connection-error' upon error."
-  (let ((sock (with-fluids ((%default-port-encoding #f))
-                ;; This trick allows use of the `scm_c_read' optimization.
-                (socket PF_UNIX SOCK_STREAM 0))))
   (define addresses
     (getaddrinfo host
                  (if (number? port) (number->string port) port)
@@ -505,7 +502,7 @@
                  (raise (condition (&store-connection-error
                                     (file host)
                                     (errno (system-error-errno args)))))
-                   (loop rest))))))))))
+                 (loop rest)))))))))
 
 (define (connect-to-daemon uri)
   "Connect to the daemon at URI, a string that may be an actual URI or a file