Remove logs in get_cpm.cmake script (#508)

* remove all logs from get_cpm.cmake

* simplify get_cpm.cmake script

cmake/get_cpm.cmake

@@ -16,21 +16,9 @@ endif()
 # Expand relative path. This is important if the provided path contains a tilde (~)
 get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
 
-message(STATUS "Using CPM at ${CPM_DOWNLOAD_LOCATION}")
-
-file(
-  DOWNLOAD
-  https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
-  ${CPM_DOWNLOAD_LOCATION}
-  STATUS CPM_DOWNLOAD_STATUS
-  EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+file(DOWNLOAD
+     https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+     ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
 )
 
-list(GET CPM_DOWNLOAD_STATUS 0 CPM_DOWNLOAD_STATUS_CODE)
-if(NOT ${CPM_DOWNLOAD_STATUS_CODE} EQUAL 0)
-  # give a fatal error when download fails
-  list(GET CPM_DOWNLOAD_STATUS 1 CPM_DOWNLOAD_ERROR_MESSAGE)
-  message(FATAL_ERROR "Error occurred during download of CPM: ${CPM_DOWNLOAD_ERROR_MESSAGE}")
-endif()
-
 include(${CPM_DOWNLOAD_LOCATION})