Remove unnecessary cons in function-type property

* lisp/emacs-lisp/comp-common.el (comp-function-type-spec): Remove
unnecessary car.
* lisp/emacs-lisp/comp.el (comp--intern-func-in-ctxt): Likewise.
* lisp/emacs-lisp/byte-run.el (byte-run--set-function-type): Update
lambda list.

lisp/emacs-lisp/byte-run.el

@@ -218,7 +218,7 @@ So far, FUNCTION can only be a symbol, not a lambda expression."
               val)))))
 
 (defalias 'byte-run--set-function-type
-  #'(lambda (f _args &rest val)
+  #'(lambda (f _args val)
       (list 'function-put (list 'quote f)
             ''function-type (list 'quote val))))
 

lisp/emacs-lisp/comp-common.el

@@ -517,7 +517,7 @@ itself."
       (when (and f (null type-spec))
         (if-let ((delc-type (function-get function 'function-type)))
             ;; Declared Lisp function
-            (setf type-spec (car delc-type))
+            (setf type-spec delc-type)
           (when (subr-native-elisp-p f)
             ;; Native compiled inferred
             (setf kind 'inferred

lisp/emacs-lisp/comp.el

@@ -825,7 +825,7 @@ clashes."
             (comp-func-lap func) lap
             (comp-func-frame-size func) (comp--byte-frame-size byte-func)
             (comp-func-speed func) (comp--spill-speed name)
-            (comp-func-declared-type func) (car (comp--spill-decl-spec name 'function-type))
+            (comp-func-declared-type func) (comp--spill-decl-spec name 'function-type)
             (comp-func-pure func) (comp--spill-decl-spec name 'pure))
 
       ;; Store the c-name to have it retrievable from