Don't prepend protocol/ to include paths

No need to add protocol/, as it's already handled by an explicit
compiler include path.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Dima Ryazanov <dima@gmail.com>

libweston/input.c

@@ -39,8 +39,8 @@
 #include "shared/helpers.h"
 #include "shared/os-compatibility.h"
 #include "compositor.h"
-#include "protocol/relative-pointer-unstable-v1-server-protocol.h"
-#include "protocol/pointer-constraints-unstable-v1-server-protocol.h"
+#include "relative-pointer-unstable-v1-server-protocol.h"
+#include "pointer-constraints-unstable-v1-server-protocol.h"
 
 enum pointer_constraint_type {
 	POINTER_CONSTRAINT_TYPE_LOCK,