gnu: linux-boot: Remove outdated and misleading comment.

* gnu/build/linux-boot.scm (boot-system): Remove outdated comment.

gnu/build/linux-boot.scm

@@ -418,7 +418,6 @@ (define (lookup-module name)
              (switch-root "/root")
              (format #t "loading '~a'...\n" to-load)
 
-             ;; TODO: Remove /lib, /share, and /loader.go.
              (primitive-load to-load)
 
              (format (current-error-port)