loop: remove children_stop_requests

It serves no purpose because process_stop() is already guarded by
`proc->stopped_time`.

src/nvim/event/loop.c

@@ -21,7 +21,6 @@ void loop_init(Loop *loop, void *data)
   loop->recursive = 0;
   loop->uv.data = loop;
   loop->children = kl_init(WatcherPtr);
-  loop->children_stop_requests = 0;
   loop->events = multiqueue_new_parent(loop_on_put, loop);
   loop->fast_events = multiqueue_new_child(loop->events);
   loop->thread_events = multiqueue_new_parent(NULL, NULL);

src/nvim/event/loop.h

@@ -37,7 +37,6 @@ typedef struct loop {
   // generic timer, used by loop_poll_events()
   uv_timer_t poll_timer;
 
-  size_t children_stop_requests;
   uv_async_t async;
   uv_mutex_t mutex;
   int recursive;

src/nvim/event/process.c

@@ -228,13 +228,10 @@ void process_stop(Process *proc) FUNC_ATTR_NONNULL_ALL
   }
 
   Loop *loop = proc->loop;
-  if (!loop->children_stop_requests++) {
-    // When there's at least one stop request pending, start a timer that
-    // will periodically check if a signal should be send to the job.
-    ILOG("starting job kill timer");
-    uv_timer_start(&loop->children_kill_timer, children_kill_cb,
-                   KILL_TIMEOUT_MS, KILL_TIMEOUT_MS);
-  }
+  // Start a timer to periodically check if a signal should be send to the job.
+  ILOG("starting job kill timer");
+  uv_timer_start(&loop->children_kill_timer, children_kill_cb,
+                 KILL_TIMEOUT_MS, KILL_TIMEOUT_MS);
 }
 
 /// Iterates the process list sending SIGTERM to stopped processes and SIGKILL
@@ -383,10 +380,8 @@ static void process_close_handles(void **argv)
 static void on_process_exit(Process *proc)
 {
   Loop *loop = proc->loop;
-  if (proc->stopped_time && loop->children_stop_requests
-      && !--loop->children_stop_requests) {
-    // Stop the timer if no more stop requests are pending
-    DLOG("Stopping process kill timer");
+  if (proc->stopped_time) {
+    DLOG("stopping process kill timer");
     uv_timer_stop(&loop->children_kill_timer);
   }