fix(CMakeLists.txt): remove redundant compiling options on windows. (#263)

Author: xiaofu-15191

CMakeLists.txt

@@ -76,13 +76,6 @@ add_compile_definitions(SPDLOG_BUILD_SHARED=OFF)
 set(spdlog_DIR ${CMAKE_SOURCE_DIR}/3rdparty/spdlog)
 add_subdirectory(3rdparty/spdlog)
 
-if(WIN32)
-    add_compile_options("/std:c++17")
-    add_compile_definitions(UNICODE _UNICODE)
-    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
-    set(GUI_TYPE WIN32)
-endif()
-
 if(UNIX AND NOT APPLE)
     find_program(LSB_RELEASE_EXEC lsb_release)
     execute_process(COMMAND ${LSB_RELEASE_EXEC} -is