Update CMakeLists.txt

Author: mcbarton

CMakeLists.txt

@@ -53,13 +53,11 @@ message(STATUS "Building xeus-cpp v${${PROJECT_NAME}_VERSION}")
 option(XEUS_CPP_BUILD_STATIC "Build xeus-cpp static library" ON)
 option(XEUS_CPP_BUILD_SHARED "Split xcpp build into executable and library" ON)
 option(XEUS_CPP_BUILD_EXECUTABLE "Build the xcpp executable" ON)
-option(XEUS_CPP_INCLUDE_DOCS "Build the xeus-cpp documentation" OFF)
 
 option(XEUS_CPP_USE_SHARED_XEUS "Link xcpp  with the xeus shared library (instead of the static library)" ON)
 option(XEUS_CPP_USE_SHARED_XEUS_CPP "Link xcpp  with the xeus shared library (instead of the static library)" ON)
 option(XEUS_CPP_EMSCRIPTEN_WASM_BUILD "Build for wasm with emscripten" OFF)
 
-
 # Test options
 option(XEUS_CPP_BUILD_TESTS "xeus-cpp test suite" ON)
 option(XEUS_CPP_ENABLE_CODE_COVERAGE "xeus-cpp test suite" OFF)
@@ -553,7 +551,3 @@ if(EMSCRIPTEN)
             "$<TARGET_FILE_DIR:xcpp>/xcpp.data"
             DESTINATION ${CMAKE_INSTALL_BINDIR})
 endif ()
-
-if(XEUS_CPP_INCLUDE_DOCS)
-    add_subdirectory(docs)
-endif()