refactor: Remove obsolete find_package file.

etc/cmake/FindSOEM.cmake

-# - Try to find soem
-# Once done this will define
-#
-#  SOEM_FOUND - soem found
-#  SOEM_INCLUDE_DIR - the soem include directory
-#  SOEM_LIBRARIES - soem library
-#
-
-if(NOT "$ENV{SOEM_DIR}" EQUAL "")
-    set(SOEM_DIR $ENV{SOEM_DIR} CACHE PATH "Path to SOEM" FORCE)
-endif()
-
-set(HEADER_SEARCH_PATHS
-    ${SOEM_DIR}/include/
-    ${SOEM_DIR}/include/soem/
-    ${SOEM_DIR}/../soem/         #if SOEM_DIR points to build
-    ${SOEM_DIR}/../osal/         #if SOEM_DIR points to build
-    ${SOEM_DIR}/../oshw/         #if SOEM_DIR points to build
-    ${SOEM_DIR}/../osal/linux/   #if SOEM_DIR points to build
-    ${SOEM_DIR}/../oshw/linux/   #if SOEM_DIR points to build
-    ENV CPATH
-    /usr/include/
-    /usr/include/soem/
-    /usr/include/
-    /usr/local/include/soem/
-    /opt/local/include/soem/
-)
-
-#if soem is used from build, all headers are scattered around
-#find all of them and add them to SOEM_INCLUDE_DIR
-find_path(SOEM_INCLUDE_DIR_0 NAMES ethercatmain.h PATHS ${HEADER_SEARCH_PATHS} NO_DEFAULT_PATH)
-
-find_path(SOEM_INCLUDE_DIR_1 NAMES osal.h PATHS ${HEADER_SEARCH_PATHS} NO_DEFAULT_PATH)
-find_path(SOEM_INCLUDE_DIR_2 NAMES osal_defs.h PATHS ${HEADER_SEARCH_PATHS} NO_DEFAULT_PATH)
-
-find_path(SOEM_INCLUDE_DIR_3 NAMES oshw.h PATHS ${HEADER_SEARCH_PATHS} NO_DEFAULT_PATH)
-find_path(SOEM_INCLUDE_DIR_4 NAMES nicdrv.h PATHS ${HEADER_SEARCH_PATHS} NO_DEFAULT_PATH)
-
-if(SOEM_INCLUDE_DIR_0 AND SOEM_INCLUDE_DIR_1 AND SOEM_INCLUDE_DIR_2 AND SOEM_INCLUDE_DIR_3 AND SOEM_INCLUDE_DIR_4)
-    set(SOEM_INCLUDE_DIR ${SOEM_INCLUDE_DIR_0} ${SOEM_INCLUDE_DIR_1} ${SOEM_INCLUDE_DIR_2} ${SOEM_INCLUDE_DIR_3} ${SOEM_INCLUDE_DIR_4})
-endif()
-
-FIND_LIBRARY(SOEM_LIBRARIES NAMES soem
-  PATHS
-  ${SOEM_DIR}                #if SOEM_DIR points to build
-  ${SOEM_DIR}/lib
-  ENV LD_LIBRARY_PATH
-  ENV LIBRARY_PATH
-  /usr/lib
-  /usr/local/lib
-  /opt/local/lib
-  NO_DEFAULT_PATH
-)
-
-include(FindPackageHandleStandardArgs)
-# handle the QUIETLY and REQUIRED arguments and set OODL_YOUBOT_FOUND to TRUE
-# if all listed variables are TRUE
-find_package_handle_standard_args(SOEM  DEFAULT_MSG
-                                  SOEM_LIBRARIES SOEM_INCLUDE_DIR)
-
-
-# show the SOEM_INCLUDE_DIR and SOEM_LIBRARY_DIR variables only in the advanced view
-MARK_AS_ADVANCED(SOEM_INCLUDE_DIR SOEM_LIBRARIES)