Remove liboauth from the Flatpak manifest
If OpenSSL 1.1.0 is installed on the host OS, liboauth would be failed on the compilation.
We might need a patch for it since liboauth has been seemed not to be an ongoing project.
See https://stackoverflow.com/questions/42662733/evp-md-ctx-error-storage-size-of-ctx-isn-t-known
Solutions
- Make a patch which is compatible with only >= 1.1.0
- Make a patch which is compatible with not only >= 1.1.0, but also in 1.0.x as well.
See more about these solutions https://stackoverflow.com/a/46769674