[CF] Remove __CFStorageEstimateTotalAllocatedSize.

This function is tagged with __attribute__((unused)) and certainly
appears to be unused. It may be a function intended for use in a
debugger context. As it is a static function, the reference to this
function and malloc_size will not necessarily be present when built,
_but_ this does cause a compiler warning when building on systems where
malloc_size or alternatives are not available.

malloc introspection, as afforded by malloc_size, malloc_usable_size, or
msize, is nonportable (and thus not guaranteed to be present on all
platforms), not guaranteed to be accurate (though certainly an upper
bound), and is generally recommended for debugging.

For those reasons, remove this function.

Author: 3405691582

CoreFoundation/Collections.subproj/CFStorage.c

@@ -1366,21 +1366,6 @@ static void __CFStorageApplyNodeBlock(CFStorageRef storage, void (^block)(CFStor
     __CFStorageApplyNodeBlockInterior(storage, &storage->rootNode, block);
 }
 
-static CFIndex __CFStorageEstimateTotalAllocatedSize(CFStorageRef storage) __attribute__((unused));
-static CFIndex __CFStorageEstimateTotalAllocatedSize(CFStorageRef storage) {
-    __block CFIndex nodeResult = 0;
-    __block CFIndex contentsResult = 0;
-    __CFStorageApplyNodeBlock(storage, ^(CFStorageRef storage, CFStorageNode *node) {
-	if (node != &storage->rootNode) {
-	    nodeResult += malloc_size(node);
-	    if (node->isLeaf && node->info.leaf.memory != NULL) {
-		contentsResult += malloc_size(node->info.leaf.memory);
-	    }
-	}
-    });
-    return nodeResult + contentsResult;
-}
-
 void __CFStorageSetAlwaysFrozen(CFStorageRef storage, bool alwaysFrozen) {
     storage->alwaysFrozen = alwaysFrozen;
 }