libbe_build: Fix build on non-Haiku platforms.

Probably should have tested that before pushing.

headers/build/os/storage/Directory.h

@@ -36,8 +36,6 @@ class BDirectory : public BNode, public BEntryList {
 
 		status_t GetEntry(BEntry *entry) const;
 
-		bool IsRootDirectory() const;
-
 		status_t FindEntry(const char *path, BEntry *entry,
 			bool traverse = false) const;
 

src/build/libbe/storage/Directory.cpp

@@ -14,8 +14,6 @@
 #include <fcntl.h>
 #include <string.h>
 
-#include <compat/sys/stat.h>
-
 #include <Directory.h>
 #include <Entry.h>
 #include <File.h>
@@ -226,19 +224,6 @@ BDirectory::GetEntry(BEntry* entry) const
 }
 
 
-bool
-BDirectory::IsRootDirectory() const
-{
-	// compare the directory's node ID with the ID of the root node of the FS
-	bool result = false;
-	node_ref ref;
-	fs_info info;
-	if (GetNodeRef(&ref) == B_OK && fs_stat_dev(ref.device, &info) == 0)
-		result = (ref.node == info.root);
-	return result;
-}
-
-
 status_t
 BDirectory::FindEntry(const char* path, BEntry* entry, bool traverse) const
 {

src/build/libbe/storage/Node.cpp

@@ -16,8 +16,6 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <compat/sys/stat.h>
-
 #include <Directory.h>
 #include <Entry.h>
 #include <fs_attr.h>