fs: mark destroy_inode static

Hugetlbfs used to need it, but after the destroy_inode and evict_inode
changes it's not required anymore.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/inode.c b/fs/inode.c
index 8646433..3368abd 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -235,7 +235,7 @@
 }
 EXPORT_SYMBOL(__destroy_inode);
 
-void destroy_inode(struct inode *inode)
+static void destroy_inode(struct inode *inode)
 {
 	__destroy_inode(inode);
 	if (inode->i_sb->s_op->destroy_inode)