[MoE] Retire the AOT moe_fused_gate / kimi_k2_moe_fused_gate gate kernels (#26771) (#29997)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

sgl-kernel/include/sgl_kernel_ops.h

@@ -315,24 +315,6 @@ void moe_sum_reduce(at::Tensor& input, at::Tensor& output, double routed_scaling
 
 void moe_sum(torch::Tensor& input, torch::Tensor& output);
 
-std::vector<at::Tensor> moe_fused_gate(
-    at::Tensor& input,
-    at::Tensor& bias,
-    int64_t num_expert_group,
-    int64_t topk_group,
-    int64_t topk,
-    int64_t num_fused_shared_experts,
-    double routed_scaling_factor,
-    bool apply_routed_scaling_factor_on_output);
-
-std::vector<at::Tensor> kimi_k2_moe_fused_gate(
-    at::Tensor& input,
-    at::Tensor& bias,
-    int64_t topk,
-    bool renormalize,
-    double routed_scaling_factor,
-    bool apply_routed_scaling_factor_on_output);
-
 void fp8_blockwise_scaled_grouped_mm(
     torch::Tensor& output,
     torch::Tensor& a_ptrs,