feat: remove sm75 (#9207)

sgl-kernel/CMakeLists.txt

@@ -170,7 +170,6 @@ option(SGL_KERNEL_ENABLE_FA3              "Enable FA3"              OFF)
 
 if (ENABLE_BELOW_SM90)
     list(APPEND SGL_KERNEL_CUDA_FLAGS
-        "-gencode=arch=compute_75,code=sm_75"
         "-gencode=arch=compute_80,code=sm_80"
         "-gencode=arch=compute_89,code=sm_89"
     )

sgl-kernel/build.sh

@@ -63,7 +63,7 @@ docker run --rm \
    ln -sv /usr/lib64/libibverbs.so.1 /usr/lib64/libibverbs.so && \
    ${PYTHON_ROOT_PATH}/bin/${TORCH_INSTALL} && \
    ${PYTHON_ROOT_PATH}/bin/pip install --no-cache-dir ninja setuptools==75.0.0 wheel==0.41.0 numpy uv scikit-build-core && \
-   export TORCH_CUDA_ARCH_LIST='7.5 8.0 8.9 9.0+PTX' && \
+   export TORCH_CUDA_ARCH_LIST='8.0 8.9 9.0+PTX' && \
    export CUDA_VERSION=${CUDA_VERSION} && \
    mkdir -p /usr/lib/${ARCH}-linux-gnu/ && \
    ln -s /usr/local/cuda-${CUDA_VERSION}/targets/${LIBCUDA_ARCH}-linux/lib/stubs/libcuda.so /usr/lib/${ARCH}-linux-gnu/libcuda.so && \