Remove and cleanup all registered input providers.
This releases the wasm function-table entries of the registered callbacks, so it must
not be called from a provider callback: libxml2 keeps calling the read and close
callbacks of the files it still has open.
Remove and cleanup all registered input providers.
This releases the wasm function-table entries of the registered callbacks, so it must not be called from a provider callback: libxml2 keeps calling the read and close callbacks of the files it still has open.