Revert "don't use #:logger argument"

This reverts commit 42bccf3e50.

pollen/private/command.rkt

@@ -27,7 +27,6 @@
      (very-nice-path (car args)))))
 
 (define (dispatch command-name)
-  (parameterize ([current-logger pollen-logger])
   (with-logging-to-port
    (current-error-port)
    (λ ()
@@ -42,8 +41,9 @@
        [("setup") (handle-setup (get-first-arg-or-current-dir))]
        [("clone" "publish") (handle-publish)]
        [else (handle-unknown command-name)]))
+   #:logger pollen-logger
    'info
-     'pollen)))
+   'pollen))
 
 (define (very-nice-path x)
   (path->complete-path (simplify-path (cleanse-path (->path x)))))