Remove @prompt memoizer

* libguile/memoize.h:
* libguile/memoize.c (MAKMEMO_CALL_WITH_PROMPT, memoize, unmemoize):
  Remove the @prompt memoizer in favor of recognizing call-with-prompt
  primcalls.  Rename SCM_M_PROMPT to SCM_M_CALL_WITH_PROMPT, and pass a
  thunk instead of an expression so that it has normal applicative
  order.

* libguile/expand.c (PRIMITIVE_REF, PRIMCALL, expand): Produce primcalls
  from forms whose car is a primitive.
  (expand_atat): Recognize (@@ primitive FOO) as being a primitive-ref.

* module/ice-9/boot-9.scm (call-with-prompt): Instead of dispatching to
  the wonky @prompt memoizer, residualize a primcall to
  call-with-prompt.  The memoizer will DTRT to allow call-with-prompt to
  be interpreted correctly without needing an additional binding.

* module/ice-9/eval.scm (primitive-eval): Change the 'prompt clause to a
  call to call-with-prompt.

* module/language/tree-il/primitives.scm: No more need to recognize
  @prompt.

* libguile/eval.c (eval): Adapt to SCM_M_PROMPT renaming to
  SCM_M_CALL_WITH_PROMPT, and apply the thunk.

* libguile/throw.c (pre_init_throw): Adapt to scm_abort_to_prompt_star
  rename.

module/language/tree-il/primitives.scm

@@ -77,7 +77,7 @@
 
     fluid-ref fluid-set!
 
-    @prompt call-with-prompt
+    call-with-prompt
     abort-to-prompt* abort-to-prompt
     make-prompt-tag
 
@@ -187,7 +187,7 @@
     dynamic-wind
     @dynamic-wind
     values
-    @prompt call-with-prompt
+    call-with-prompt
     @abort abort-to-prompt))
 
 ;; Procedures that cause a nonlocal, non-resumable abort.
@@ -586,23 +586,6 @@
               ((src fluid exp) (make-dynset src fluid exp))
               (else #f)))
 
-(hashq-set! *primitive-expand-table*
-            '@prompt
-            (case-lambda
-              ((src tag exp handler)
-               (let ((args-sym (gensym)))
-                 (make-prompt
-                  src tag exp
-                  ;; If handler itself is a lambda, the inliner can do some
-                  ;; trickery here.
-                  (make-lambda-case
-                   (tree-il-src handler) '() #f 'args #f '() (list args-sym)
-                   (make-primcall #f 'apply
-                                  (list handler
-                                        (make-lexical-ref #f 'args args-sym)))
-                   #f))))
-              (else #f)))
-
 (hashq-set! *primitive-expand-table*
             'call-with-prompt
             (case-lambda