Remove batch_prefill from FMHA_FWD_KNOWN_APIS
Remove `batch_prefill` from the `FMHA_FWD_KNOWN_APIS` list in
`projects/composablekernel/example/ck_tile/01_fmha/CMakeLists.txt`.
**Change:**
```cmake
# Before
set(FMHA_FWD_KNOWN_APIS "fwd;fwd_splitkv;fwd_appendkv;pagedkv_prefill;batch_prefill")
# After
set(FMHA_FWD_KNOWN_APIS "fwd;fwd_splitkv;fwd_appendkv;pagedkv_prefill")
```
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: asleepzzz <4926646+asleepzzz@users.noreply.github.com>
Co-authored-by: asleepzzz <hanwen.chang@amd.com>
Co-authored-by: Po Yen Chen <PoYen.Chen@amd.com>
4d852e80fb