remove "done" folders, label "bs/droneenter, bs/dronelook, and bs/dronevanish files and functions"

src/core1/os/settimer.c

@@ -0,0 +1,19 @@
+#include <os_internal.h>
+#include "osint.h"
+int osSetTimer(OSTimer *t, OSTime value, OSTime interval, OSMesgQueue *mq, OSMesg msg)
+{
+    OSTime time;
+    t->next = NULL;
+    t->prev = NULL;
+    t->interval = interval;
+    if(value != 0) t->value = value;
+    else t->value = interval;
+    t->mq = mq;
+    t->msg = msg;
+    time = __osInsertTimer(t);
+    if(__osTimerList->next == t) {
+        __osSetTimerIntr(time);
+    }
+    return 0;
+}
+