Revert "Add record type printers for srfi-41 and srfi-45."

This reverts commit 4a1cdc9d5d, which was
prematurely pushed.

module/srfi/srfi-41.scm

@@ -27,7 +27,6 @@
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-8)
   #:use-module (srfi srfi-9)
-  #:use-module (srfi srfi-9 gnu)
   #:use-module (srfi srfi-26)
   #:use-module (ice-9 match)
   #:export (stream-null stream-cons stream? stream-null? stream-pair?
@@ -149,7 +148,7 @@
 
 (define stream? stream-promise?)
 
-(define %stream-null (cons 'stream 'null))
+(define %stream-null '(stream . null))
 (define stream-null (stream-eager %stream-null))
 
 (define (stream-null? obj)
@@ -181,26 +180,6 @@
 (define-syntax-rule (stream-lambda formals body0 body1 ...)
   (lambda formals (stream-lazy (begin body0 body1 ...))))
 
-(set-record-type-printer! stream-promise
-  (lambda (strm port)
-    (display "#<stream" port)
-    (let loop ((strm strm))
-      (define value (stream-promise-val strm))
-      (case (stream-value-tag value)
-        ((eager)
-         (let ((pare (stream-value-proc value)))
-           (if (eq? pare %stream-null)
-               (write-char #\> port)
-               (let* ((kar (stream-kar pare))
-                      (kar-value (stream-promise-val kar)))
-                 (write-char #\space port)
-                 (case (stream-value-tag kar-value)
-                   ((eager) (write (stream-value-proc kar-value) port))
-                   ((lazy)  (write-char #\? port)))
-                 (loop (stream-kdr pare))))))
-        ((lazy)
-         (display " ...>" port))))))
-
 ;;; Derived stream functions and macros: (streams derived)
 
 (define-syntax-rule (define-stream (name . formal) body0 body1 ...)

module/srfi/srfi-45.scm

@@ -39,8 +39,7 @@
              eager
              promise?)
   #:replace (delay force promise?)
-  #:use-module (srfi srfi-9)
-  #:use-module (srfi srfi-9 gnu))
+  #:use-module (srfi srfi-9))
 
 (cond-expand-provide (current-module) '(srfi-45))
 
@@ -77,8 +76,3 @@
 ;; (*) These two lines re-fetch and check the original promise in case
 ;;     the first line of the let* caused it to be forced.  For an example
 ;;     where this happens, see reentrancy test 3 below.
-
-(set-record-type-printer! promise
-  (lambda (promise port)
-    (define content (promise-val promise))
-    (format port "#<~a ~s>" (value-tag content) (value-proc content))))