Fix asio dependency (#3411)

* Fix unnecessary asio dependency

* Remove asio from CMakeList

(cherry picked from commit 3fa1a2b)

examples/cpp/dds/DeadlineQoSExample/CMakeLists.txt

@@ -29,10 +29,6 @@ if(NOT fastrtps_FOUND)
     find_package(fastrtps REQUIRED)
 endif()
 
-if(NOT Asio_FOUND)
-    find_package(Asio QUIET)
-endif()
-
 #Check C++11
 include(CheckCXXCompilerFlag)
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
@@ -47,12 +43,9 @@ file(GLOB DDS_DEADLINEQOS_EXAMPLE_SOURCES "*.cxx")
 
 add_executable(DDSDeadlineQoSExample ${DDS_DEADLINEQOS_EXAMPLE_SOURCES})
 target_compile_definitions(DDSDeadlineQoSExample PRIVATE
-    BOOST_ASIO_STANDALONE
-    ASIO_STANDALONE
     $<$<AND:$<NOT:$<BOOL:${WIN32}>>,$<STREQUAL:"${CMAKE_BUILD_TYPE}","Debug">>:__DEBUG>
     $<$<BOOL:${INTERNAL_DEBUG}>:__INTERNALDEBUG> # Internal debug activated.
     )
-target_include_directories(DDSDeadlineQoSExample PRIVATE ${Asio_INCLUDE_DIR})
 target_link_libraries(DDSDeadlineQoSExample fastrtps fastcdr foonathan_memory)
 if(UNIX AND NOT(QNXNTO) AND NOT(ANDROID))
     target_link_libraries(DDSDeadlineQoSExample pthread)

examples/cpp/dds/DeadlineQoSExample/deadlinepayloadPubSubMain.cxx

@@ -18,11 +18,9 @@
 
 #include <fastrtps/Domain.h>
 #include <fastrtps/log/Log.h>
-#include "asio.hpp"
 
 using namespace eprosima;
 using namespace eprosima::fastrtps;
-using namespace asio;
 
 /**
  * @brief Parses command line arguments