Remove legacy kernels (#222)

Summary:
Pull Request resolved: #222

As titled.

Differential Revision: D96475866

Author: cthi

MslkDefault.cmake

@@ -10,17 +10,13 @@
 
 glob_files_nohip(mslk_cpp_source_files_cpu
   csrc/attention/cuda/cutlass_blackwell_fmha/blackwell_*.cpp
-  csrc/attention/cuda/gqa_attn_splitk/*.cpp
   csrc/conv/*.cpp
   csrc/gemm/*.cpp
-  csrc/kv_cache/*.cpp
   csrc/moe/*.cpp
   csrc/quantize/*.cpp
   csrc/attention/ck/fmha/*.cpp)
 
 glob_files_nohip(mslk_cpp_source_files_gpu
-  csrc/attention/cuda/gqa_attn_splitk/*.cu
-  csrc/kv_cache/*.cu
   csrc/moe/*.cu
   csrc/quantize/*.cu)
 

ci/scripts/mslk_build.bash

@@ -595,7 +595,6 @@ __verify_library_symbols () {
   if [ "${mslk_build_target}" == "default" ]; then
     local lib_symbols_to_check=(
       mslk::gemm::f8f8bf16_rowwise
-      mslk::kv_cache::rope_qkv_decoding
       mslk::moe::index_shuffling_torch
       mslk::quantize::quantize_fp8_per_row
     )

ci/scripts/mslk_install.bash

@@ -71,7 +71,6 @@ __install_check_subpackages () {
     mslk.attention
     mslk.conv
     mslk.gemm
-    mslk.kv_cache
     mslk.moe
     mslk.quantize
     mslk.testing
@@ -97,7 +96,6 @@ __install_check_operator_registrations () {
 
   if [ "$installed_mslk_target" == "default" ]; then
     test_operators+=(
-      torch.ops.mslk.rope_qkv_decoding
       torch.ops.mslk.f8f8bf16_rowwise
     )
   fi