Remove CMAKE_CXX_STANDARD (#1704)

(cherry picked from commit b336d85)

Author: christophfroehlich

range_sensor_broadcaster/CMakeLists.txt

@@ -1,12 +1,6 @@
 cmake_minimum_required(VERSION 3.8)
 project(range_sensor_broadcaster)
 
-# Default to C++17
-if(NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 17)
-  set(CMAKE_CXX_STANDARD_REQUIRED ON)
-endif()
-
 find_package(ros2_control_cmake REQUIRED)
 set_compiler_options()
 export_windows_symbols()