[uaccess] Remove redundant memcpy_user() and related string functions

The memcpy_user(), memmove_user(), memcmp_user(), memset_user(), and
strlen_user() functions are now just straightforward wrappers around
the corresponding standard library functions.

Remove these redundant wrappers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/crypto/deflate.c

@@ -464,8 +464,8 @@ static void deflate_copy ( struct deflate_chunk *out,
 		if ( copy_len > len )
 			copy_len = len;
 		while ( copy_len-- ) {
-			memcpy_user ( out->data, out_offset++,
-				      start, offset++, 1 );
+			memcpy ( ( out->data + out_offset++ ),
+				 ( start + offset++ ), 1 );
 		}
 	}
 	out->offset += len;