crimson/.../osd_operation: remove max_in_progress shortcut in with_throttle

This made sense prior to the addition of the scheduler.  Now, we need
to go through the scheduler whether there's a max or not.

Signed-off-by: Samuel Just <[email protected]>

Author: athanatos

src/crimson/osd/osd_operation.h

@@ -314,7 +314,6 @@ class OperationThrottler : public BlockerT<OperationThrottler>,
   auto with_throttle(
     crimson::osd::scheduler::params_t params,
     F &&f) {
-    if (!max_in_progress) return f();
     return acquire_throttle(params)
       .then(std::forward<F>(f))
       .finally([this] {