Removed CMake check for ModemManager

cmake/modules/FindModemManager.cmake

-# - Try to find ModemManager
-# Once done this will define
-#
-#  MODEMMANAGER_FOUND - system has ModemManager
-#  MODEMMANAGER_INCLUDE_DIRS - the ModemManager include directories
-#  MODEMMANAGER_LIBRARIES - the libraries needed to use ModemManager
-#  MODEMMANAGER_CFLAGS - Compiler switches required for using ModemManager
-#  MODEMMANAGER_VERSION - version number of ModemManager
-
-# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
-# Copyright (c) 2007, Will Stephenson, <wstephenson@kde.org>
-# Copyright (c) 2013, Lukas Tinkl, <ltinkl@redhat.com>
-#
-# Redistribution and use is allowed according to the terms of the BSD license.
-# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
-
-
-IF (MODEMMANAGER_INCLUDE_DIRS)
-   # in cache already
-   SET(NetworkManager_FIND_QUIETLY TRUE)
-ENDIF (MODEMMANAGER_INCLUDE_DIRS)
-
-IF (NOT WIN32)
-   # use pkg-config to get the directories and then use these values
-   # in the FIND_PATH() and FIND_LIBRARY() calls
-   find_package(PkgConfig)
-   PKG_SEARCH_MODULE( MODEMMANAGER ModemManager )
-ENDIF (NOT WIN32)
-
-IF (MODEMMANAGER_FOUND)
-   IF (ModemManager_FIND_VERSION AND ("${MODEMMANAGER_VERSION}" VERSION_LESS "${ModemManager_FIND_VERSION}"))
-      MESSAGE(FATAL_ERROR "ModemManager ${MODEMMANAGER_VERSION} is too old, need at least ${ModemManager_FIND_VERSION}")
-   ELSEIF (NOT ModemManager_FIND_QUIETLY)
-      MESSAGE(STATUS "Found ModemManager ${MODEMMANAGER_VERSION}: ${MODEMMANAGER_INCLUDE_DIRS}")
-   ENDIF()
-ELSE (MODEMMANAGER_FOUND)
-   IF (ModemManager_FIND_REQUIRED)
-      MESSAGE(FATAL_ERROR "Could NOT find ModemManager, check FindPkgConfig output above!")
-   ENDIF (ModemManager_FIND_REQUIRED)
-ENDIF (MODEMMANAGER_FOUND)
-
-MARK_AS_ADVANCED(MODEMMANAGER_INCLUDE_DIRS)