panfrost,asahi: Remove unused prepare macro

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18922>

src/asahi/lib/gen_pack.py

@@ -89,9 +89,6 @@ __gen_unpack_sint(const uint8_t *restrict cl, uint32_t start, uint32_t end)
    return util_sign_extend(val, size);
 }
 
-#define agx_prepare(dst, T)                                 \\
-   *(dst) = (struct AGX_ ## T){ AGX_ ## T ## _header }
-
 #define agx_pack(dst, T, name)                              \\
    for (struct AGX_ ## T name = { AGX_ ## T ## _header }, \\
         *_loop_terminate = (void *) (dst);                  \\

src/panfrost/lib/genxml/gen_pack.py

@@ -102,9 +102,6 @@ __gen_unpack_padded(const uint8_t *restrict cl, uint32_t start, uint32_t end)
 #define PREFIX2(A, B) MALI_ ## A ## _ ## B
 #define PREFIX4(A, B, C, D) MALI_ ## A ## _ ## B ## _ ## C ## _ ## D
 
-#define pan_prepare(dst, T)                                 \\
-   *(dst) = (struct PREFIX1(T)){ PREFIX2(T, header) }
-
 #define pan_pack(dst, T, name)                              \\
    for (struct PREFIX1(T) name = { PREFIX2(T, header) }, \\
         *_loop_terminate = (void *) (dst);                  \\