The file plugin_adapter_exitcode_mapping.properties seems to be present in the agent directory of all agents running the SAP plugin, but there seems to be no documenation that explains the purpose or scope of the file.
Any
The purpose of the plugin_adapter_exitcode_mapping.properties file is specifically for converting SAP Adapter (which is End of Life) jobs to the SAP plugin.
It serves no other purpose for plugin functionality.
As result, this fie can be safely removed.