uio: remove the unused iov_for_each macro

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

.clang-format

@@ -259,7 +259,6 @@ ForEachMacros:
   - 'idr_for_each_entry_ul'
   - 'inet_bind_bucket_for_each'
   - 'inet_lhash2_for_each_icsk_rcu'
-  - 'iov_for_each'
   - 'key_for_each'
   - 'key_for_each_safe'
   - 'klp_for_each_func'

include/linux/uio.h

@@ -110,14 +110,6 @@ static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
 	};
 }
 
-#define iov_for_each(iov, iter, start)				\
-	if (iov_iter_type(start) == ITER_IOVEC ||		\
-	    iov_iter_type(start) == ITER_KVEC)			\
-	for (iter = (start);					\
-	     (iter).count &&					\
-	     ((iov = iov_iter_iovec(&(iter))), 1);		\
-	     iov_iter_advance(&(iter), (iov).iov_len))
-
 size_t iov_iter_copy_from_user_atomic(struct page *page,
 		struct iov_iter *i, unsigned long offset, size_t bytes);
 void iov_iter_advance(struct iov_iter *i, size_t bytes);