Remove redundant check-ptr usage

core/libc/libc-docs.factor

@@ -26,8 +26,7 @@ HELP: memcpy
 
 HELP: check-ptr
 { $values { "c-ptr" "an alien address, byte array, or " { $link f } } { "checked" "an alien address or byte array with non-zero address" } }
-{ $description "Throws an error if the input is " { $link f } ". Otherwise the object remains on the data stack. This word should be used to check the return values of " { $link malloc } " and " { $link realloc } " before use." }
-{ $error-description "Callers of " { $link malloc } " and " { $link realloc } " should use " { $link check-ptr } " to throw an error in the case of a memory allocation failure." } ;
+{ $description "Throws an error if the input is " { $link f } ". Otherwise the object remains on the data stack." } ;
 
 HELP: free
 { $values { "alien" c-ptr } }

core/libc/libc.factor

@@ -84,4 +84,4 @@ PRIVATE>
     "void" "libc" "memcpy" { "void*" "void*" "ulong" } alien-invoke ;
 
 : with-malloc ( size quot -- )
-    swap 1 calloc check-ptr swap keep free ; inline
+    swap 1 calloc swap keep free ; inline

extra/io/buffers/buffers.factor

@@ -79,7 +79,7 @@ HINTS: search-buffer-until { fixnum fixnum simple-alien string } ;
     buffer-fill zero? ;
 
 : extend-buffer ( n buffer -- )
-    2dup buffer-ptr swap realloc check-ptr
+    2dup buffer-ptr swap realloc
     over set-buffer-ptr set-buffer-size ;
 
 : check-overflow ( n buffer -- )