remove dlluring.so from install file list

[olafhering]

It is unclear what the purpose of dlluring.so is. It is an ELF file with an SONAME (liburing.so.2). Nothing appears to link to this SONAME. Nothing appears to dlopen this SONAME. Nothing appears to open the dll name.

The presence of this ELF file causes the rpm package check to emit a Provides: liburing.so.2()(64bit). This conflicts with the system liburing package. The system package resolver is undecided which of the two provides are supposed to be used. Clearly the lib provided by OCaml can not be used by binaries which link to liburing.so.2 via ELF NEEDED.

[talex5]

I believe it's used for building bytecode. https://dune.readthedocs.io/en/latest/dune-files.html#linking-modes says:

By default, Dune builds and installs dynamically-linked foreign archives (usually named dll*.so). It’s possible to disable this by setting by including (disable_dynamically_linked_foreign_archives true) in the workspace file, so bytecode executables will be built with all foreign archives statically linked into the runtime system.