gallium/aux/tgsi_exec.c: Remove unused parameter from fetch_src_file_channel

remove unused parameter chan_index from fetch_src_file_channel, fixes warning:

tgsi/tgsi_exec.c: In Funktion »fetch_src_file_channel«:
tgsi/tgsi_exec.c:1480:35: Warning: unused parameter »chan_index« [-Wunused-parameter]
                        const uint chan_index,
                                   ^~~~~~~~~~

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed