Clear windows branch; preserve previous contents in win-old

kernels/k/dltss_pwin_enc0_layer.hip

@@ -1,19 +0,0 @@
-// CU mode: the waves of a window share one L0 cache (1-6% faster here; slower in the wide layers)
-// d4r-build-flags: -mcumode
-#define PWIN_F32ACC
-#ifndef D4R_K_POS_MT
-#define D4R_K_POS_MT 2
-#elif !defined(__GFX12__) || !defined(D4R_K_FP16_BASELINE)
-#error "experimental position token tiling requires gfx12 strict K baseline"
-#endif
-// Reuse V across the window's waves. Paired gfx1201 replays retain every half
-// code and reduce enc0 time by about 5%; gfx11 and arithmetic experiments keep
-// their previous path. D4R_K_PRIVATE_V supplies the original A/B control.
-#if defined(__GFX12__) && defined(D4R_K_FP16_BASELINE) && !defined(D4R_K_PRIVATE_V) && \
-    !defined(D4R_K_PACKED_ACC) && !defined(D4R_K_F16_WMMA)
-#ifndef POS_VSHARE
-#define POS_VSHARE
-#endif
-#endif
-#include "pwin_pos.h"
-POS_ENCODER(dltss_pwin_enc0_layer, 2, 32, 64, 16, D4R_K_POS_MT)