Revert "repl.scm next-char needed to read EOF from port"

Actually peek-char => EOF does not guarantee that read-char => EOF. I
don't know what to do about this.

This reverts commit 6e1dccc42f.

module/system/repl/repl.scm

@@ -173,7 +173,7 @@
 (define (next-char wait)
   (if (or wait (char-ready?))
       (let ((ch (peek-char)))
-	(cond ((eof-object? ch) (read-char) ch)
+	(cond ((eof-object? ch) ch)
 	      ((char-whitespace? ch) (read-char) (next-char wait))
 	      (else ch)))
       #f))