dotnet: remove unneeded dependency to ortoolslib
dotnet: remove unneeded dependency to ortoolslib

google/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,or-tools/or-tools,google/or-tools,google/or-tools,or-tools/or-tools,or-tools/or-tools,or-tools/or-tools