Remove empty directory and empty CMakeLists.txt

Author: ruslo

CMakeLists.txt

@@ -159,7 +159,6 @@ endif(DOXYGEN_FOUND)
 if(CPP-NETLIB_BUILD_SINGLE_LIB)
   include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/config/src
-    ${CMAKE_CURRENT_SOURCE_DIR}/error/src
     ${CMAKE_CURRENT_SOURCE_DIR}/concurrency/src
     ${CMAKE_CURRENT_SOURCE_DIR}/http/src
     ${CMAKE_CURRENT_SOURCE_DIR}/logging/src
@@ -172,7 +171,6 @@ endif()
 add_subdirectory(uri)
 add_subdirectory(message)
 add_subdirectory(logging)
-add_subdirectory(error)
 add_subdirectory(http)
 add_subdirectory(concurrency)
 #add_subdirectory(mime)