util/co-shared-resource: Remove unused co_try_get_from_shres

co_try_get_from_shres hasn't been used since it was added in
  55fa54a789 ("co-shared-resource: protect with a mutex")

(Everyone uses the _locked version)
Remove it.

Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Message-Id: <20240918124220.27871-1-dave@treblig.org>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

include/qemu/co-shared-resource.h

@@ -44,13 +44,6 @@ SharedResource *shres_create(uint64_t total);
  */
 void shres_destroy(SharedResource *s);
 
-/*
- * Try to allocate an amount of @n.  Return true on success, and false
- * if there is too little left of the collective resource to fulfill
- * the request.
- */
-bool co_try_get_from_shres(SharedResource *s, uint64_t n);
-
 /*
  * Allocate an amount of @n, and, if necessary, yield until
  * that becomes possible.

util/qemu-co-shared-resource.c

@@ -66,12 +66,6 @@ static bool co_try_get_from_shres_locked(SharedResource *s, uint64_t n)
     return false;
 }
 
-bool co_try_get_from_shres(SharedResource *s, uint64_t n)
-{
-    QEMU_LOCK_GUARD(&s->lock);
-    return co_try_get_from_shres_locked(s, n);
-}
-
 void coroutine_fn co_get_from_shres(SharedResource *s, uint64_t n)
 {
     assert(n <= s->total);