Delete old CMakeLists nobody needs

CMakeLists.txt

-cmake_minimum_required(VERSION 3.10)
-
-project(
-    superfiphoboserver
-)
-
-if(NOT DEFINED FIPHOBOSERVER_PREFIX_PATH)
-    set(FIPHOBOSERVER_PREFIX_PATH "./external/fiphoboserver")
-endif()
-
-get_filename_component(PHOBOS_INCLUDE_DIRECTORY ./external/phobos/src/include ABSOLUTE
-                       ${CMAKE_CURRENT_SOURCE_DIR})
-
-set(CUSTOM_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
-
-find_package(proxygen REQUIRED)
-
-add_subdirectory(${FIPHOBOSERVER_PREFIX_PATH} build/build)