fix: use the default destructor that automatically drops the zenoh reply/query and hence sends the final signal (#473) (#475)

(cherry picked from commit 4fc36b7)

Co-authored-by: Yuyuan Yuan <[email protected]>

Author: mergify[bot]

rmw_zenoh_cpp/src/detail/zenoh_utils.cpp

@@ -53,9 +53,6 @@ std::chrono::nanoseconds::rep ZenohQuery::get_received_timestamp() const
   return received_timestamp_;
 }
 
-///=============================================================================
-ZenohQuery::~ZenohQuery() {}
-
 ///=============================================================================
 const zenoh::Query & ZenohQuery::get_query() const {return query_;}
 
@@ -68,9 +65,6 @@ ZenohReply::ZenohReply(
   received_timestamp_ = received_timestamp;
 }
 
-///=============================================================================
-ZenohReply::~ZenohReply() {}
-
 ///=============================================================================
 const zenoh::Reply & ZenohReply::get_sample() const
 {

rmw_zenoh_cpp/src/detail/zenoh_utils.hpp

@@ -40,7 +40,7 @@ class ZenohReply final
 public:
   ZenohReply(const zenoh::Reply & reply, std::chrono::nanoseconds::rep received_timestamp);
 
-  ~ZenohReply();
+  ~ZenohReply() = default;
 
   const zenoh::Reply & get_sample() const;
 
@@ -58,7 +58,7 @@ class ZenohQuery final
 public:
   ZenohQuery(const zenoh::Query & query, std::chrono::nanoseconds::rep received_timestamp);
 
-  ~ZenohQuery();
+  ~ZenohQuery() = default;
 
   const zenoh::Query & get_query() const;