Remove random demos

Cool, but cumbersome in practice: have to continually restart until I get the demo I want.

So let's stick to init for now.

kernel/src/main.cpp

@@ -124,36 +124,7 @@ extern "C" void _start()
         }
     });
 
-    uint64_t demo = Mersenne::get() % 6;
-
-    switch (demo)
-    {
-    case 0:
-        kinfoln("Loading demo: example init program");
     Scheduler::load_user_task("bin/init");
-        break;
-    case 1:
-        kinfoln("Loading demo: first 50 fibonacci numbers");
-        Scheduler::load_user_task("bin/fib");
-        break;
-    case 2:
-        kinfoln("Loading demo: leap year calculator");
-        Scheduler::load_user_task("bin/leap");
-        break;
-    case 3:
-        kinfoln("Loading demo: painting program");
-        Scheduler::load_user_task("bin/art");
-        break;
-    case 4:
-        kinfoln("Loading demo: memory eating program");
-        Scheduler::load_user_task("bin/memeater");
-        break;
-    case 5:
-        kinfoln("Loading demo: misbehaving program");
-        Scheduler::load_user_task("bin/quota");
-        break;
-    default: break;
-    }
 
     kinfoln("Prepared scheduler tasks");