fix curl compile cmake

CMakeLists.txt

@@ -1,10 +1,8 @@
 cmake_minimum_required(VERSION 3.5)
 project(pengobot)
-add_definitions(-DCURL_STATICLIB)
 SET(CMAKE_CXX_STANDARD 17)
 SET(CMAKE_CXX_STANDARD_REQUIRED True)
 SET(CMAKE_CXX_FLAGS "-O3")
-find_package(CURL REQUIRED) 
-include_directories(${CURL_INCLUDE_DIR})
+find_package(CURL REQUIRED)
 add_subdirectory(src)
 install(TARGETS pengobot RUNTIME DESTINATION bin)