pan/decode: Drop scratchpad size dump

It fails if the scratchpad isn't actually mapped from pandecode's
perspective, and isn't useful information to us at this point.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6476>

src/panfrost/lib/decode.c

@@ -487,14 +487,6 @@ pandecode_shared_memory(const struct mali_shared_memory *desc, bool is_compute)
         MEMORY_PROP(desc, scratchpad);
         MEMORY_PROP(desc, shared_memory);
         MEMORY_PROP(desc, unknown1);
-
-        if (desc->scratchpad) {
-                struct pandecode_mapped_memory *smem =
-                        pandecode_find_mapped_gpu_mem_containing(desc->scratchpad);
-
-                pandecode_msg("scratchpad size %u\n", smem->length);
-        }
-
 }
 
 static struct pandecode_fbd