Do not display a cursor on output creation

Now we don't display a cursor unless a pointer device is connected.

Fixes #2

output.c

@@ -169,8 +169,6 @@ handle_new_output(struct wl_listener *listener, void *data)
 			wlr_output->name,
 			wlr_output->scale);
 	}
-	wlr_xcursor_manager_set_cursor_image(server->seat->xcursor_manager, DEFAULT_XCURSOR,
-					     server->seat->cursor);
 
 	/* Place the cursor in the center of the screen. */
 	wlr_cursor_warp(server->seat->cursor, NULL, wlr_output->width / 2, wlr_output->height / 2);

seat.c

@@ -20,6 +20,7 @@
 #include "server.h"
 #include "view.h"
 
+#define DEFAULT_XCURSOR "left_ptr"
 #define XCURSOR_SIZE 24
 
 static inline bool
@@ -353,7 +354,6 @@ process_cursor_motion(struct cg_seat *seat, uint32_t time)
 	   surface. There cannot be a surface without a view,
 	   either. It's both or nothing. */
 	if (!view) {
-		// wlr_xcursor_manager_set_cursor_image(seat->cursor_mgr, DEFAULT_XCURSOR, seat->cursor);
 		wlr_seat_pointer_clear_focus(wlr_seat);
 	} else {
 		wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);

seat.h

@@ -10,8 +10,6 @@
 #include "server.h"
 #include "view.h"
 
-#define DEFAULT_XCURSOR "left_ptr"
-
 struct cg_seat {
 	struct wlr_seat *seat;
 	struct cg_server *server;