Merged code-gc, data-gc primitives into a gc primitive

extra/cocoa/cocoa-tests.factor

@@ -10,7 +10,7 @@ CLASS: {
     "foo:"
     "void"
     { "id" "SEL" "NSRect" }
-    [ data-gc "x" set 2drop ]
+    [ gc "x" set 2drop ]
 } ;
 
 : test-foo

extra/tools/memory/memory-docs.factor

@@ -15,8 +15,7 @@ ARTICLE: "tools.memory" "Object memory tools"
 "You can check an object's the heap memory usage:"
 { $subsection size }
 "The garbage collector can be invoked manually:"
-{ $subsection data-gc }
-{ $subsection code-gc }
+{ $subsection gc }
 { $see-also "images" } ;
 
 ABOUT: "tools.memory"

extra/tools/profiler/profiler-tests.factor

@@ -8,7 +8,7 @@ alien tools.profiler.private sequences ;
     \ length profile-counter =
 ] unit-test
 
-[ ] [ [ 10 [ data-gc ] times ] profile ] unit-test
+[ ] [ [ 10 [ gc ] times ] profile ] unit-test
 
 [ ] [ [ 1000 sleep ] profile ] unit-test