timer: remove unnecessary dependency on likely

I don't see likely/unlikely being used by ccan/timer or any of its
dependencies right now.

Running `tools/ccanlint/ccanlint ccan/timer' reveals no regressions
Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

ccan/timer/_info

@@ -70,7 +70,6 @@ int main(int argc, char *argv[])
 	if (strcmp(argv[1], "depends") == 0) {
 		printf("ccan/array_size\n");
 		printf("ccan/ilog\n");
-		printf("ccan/likely\n");
 		printf("ccan/list\n");
 		printf("ccan/time\n");
 		return 0;

ccan/timer/timer.c

@@ -2,7 +2,6 @@
 #include <ccan/timer/timer.h>
 #include <ccan/array_size/array_size.h>
 #include <ccan/ilog/ilog.h>
-#include <ccan/likely/likely.h>
 #include <stdlib.h>
 #include <stdio.h>