panfrost: Simplify bind_blend_state

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6440>
diff --git a/src/gallium/drivers/panfrost/pan_blend_cso.c b/src/gallium/drivers/panfrost/pan_blend_cso.c
index 4d90101..46b0832 100644
--- a/src/gallium/drivers/panfrost/pan_blend_cso.c
+++ b/src/gallium/drivers/panfrost/pan_blend_cso.c
@@ -146,12 +146,7 @@
                           void *cso)
 {
         struct panfrost_context *ctx = pan_context(pipe);
-        struct pipe_blend_state *blend = (struct pipe_blend_state *) cso;
-        struct panfrost_blend_state *pblend = (struct panfrost_blend_state *) cso;
-        ctx->blend = pblend;
-
-        if (!blend)
-                return;
+        ctx->blend = (struct panfrost_blend_state *) cso;
 }
 
 static void