alignof: remove unnecessary ccan/build_assert dependency.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

ccan/alignof/_info

@@ -44,7 +44,6 @@ int main(int argc, char *argv[])
 		return 1;
 
 	if (strcmp(argv[1], "depends") == 0) {
-		printf("ccan/build_assert\n");
 		return 0;
 	}