removes CONAN_PKG from build system

CMakeLists.txt

@@ -85,9 +85,7 @@ if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND BUILD_SHARED_LIBS)
 else()
     target_link_libraries(${PROJECT_NAME} PUBLIC dbt-rise-core)
 endif()
-if(TARGET CONAN_PKG::elfio)
-    target_link_libraries(${PROJECT_NAME} PUBLIC CONAN_PKG::elfio)
-elseif(TARGET elfio::elfio)
+if(TARGET elfio::elfio)
     target_link_libraries(${PROJECT_NAME} PUBLIC elfio::elfio)
 else()
     message(FATAL_ERROR "No elfio library found, maybe a find_package() call is missing")