panfrost: Remove ancient unused code

Leftover scraps.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16173>

src/gallium/drivers/panfrost/pan_context.h

@@ -48,9 +48,6 @@
 #include "midgard/midgard_compile.h"
 #include "compiler/shader_enums.h"
 
-/* Forward declare to avoid extra header dep */
-struct prim_convert_context;
-
 #define SET_BIT(lval, bit, cond) \
 	if (cond) \
 		lval |= (bit); \

src/gallium/drivers/panfrost/pan_screen.c

@@ -105,7 +105,6 @@ panfrost_get_param(struct pipe_screen *screen, enum pipe_cap param)
         bool has_heap = dev->kernel_version->version_major > 1 ||
                         dev->kernel_version->version_minor >= 1;
 
-        /* Bifrost is WIP */
         switch (param) {
         case PIPE_CAP_NPOT_TEXTURES:
         case PIPE_CAP_MIXED_COLOR_DEPTH_BITS: