[PATCH v2] powerpc/boot: Drop unused min_t()/max_t() helpers

Commit c762c69e106f ("powerpc/boot: Add support for XZ compression")
added min_t() and max_t() to support XZ in the boot wrapper. However,
since commit 9f121705503a ("lib/xz: replace min_t with min") XZ no
longer depends on these helpers. Remove them from the boot wrapper.

Signed-off-by: Thorsten Blum <blum@kernel.org>
---
Changes in v2:
- Mention the commit that removed XZ's dependency on min_t(), fixing the
  build failure seen with v1
- v1: https://lore.kernel.org/r/20260525091839.817778-3-thorsten.blum@linux.dev/ (local)
---
 arch/powerpc/boot/types.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/powerpc/boot/types.h b/arch/powerpc/boot/types.h
index 8a4c418b7260..c5085c2632bf 100644
--- a/arch/powerpc/boot/types.h
+++ b/arch/powerpc/boot/types.h

@@ -37,9 +37,6 @@ typedef s64 int64_t;
 	(void) (&_x == &_y);	\
 	_x > _y ? _x : _y; })
 
-#define min_t(type, a, b) min(((type) a), ((type) b))
-#define max_t(type, a, b) max(((type) a), ((type) b))
-
 typedef int bool;
 
 #ifndef true