etnaviv: remove tgsi remains

tokens member was not used for a long time.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23738>

src/gallium/drivers/etnaviv/etnaviv_shader.c

@@ -540,7 +540,6 @@ etna_delete_shader_state(struct pipe_context *pctx, void *ss)
       etna_destroy_shader(t);
    }
 
-   tgsi_free_tokens(shader->tokens);
    ralloc_free(shader->nir);
    util_queue_fence_destroy(&shader->ready);
    FREE(shader);

src/gallium/drivers/etnaviv/etnaviv_shader.h

@@ -79,7 +79,6 @@ struct etna_shader {
    uint32_t id;
    uint32_t variant_count;
 
-   struct tgsi_token *tokens;
    struct nir_shader *nir;
    const struct etna_specs *specs;
    struct etna_compiler *compiler;