fix build on cuda 11.5 (#1277)

On CUDA 11.8 raft currently compiles fine, but with CUDA 11.5 I see unused function parameter warnings, which are currently treated as errors and therefore prevents compilation. This PR reenables compilation on 11.5 CUDA versions by removing the unused parameters

Authors:
  - Ben Frederickson (https://github.com/benfred)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)

URL: #1277

cpp/include/raft/distance/detail/distance.cuh

@@ -247,9 +247,9 @@ struct DistanceImpl<raft::distance::DistanceType::InnerProduct,
            Index_ m,
            Index_ n,
            Index_ k,
-           void* workspace,
-           size_t worksize,
-           FinalLambda fin_op,
+           void*,
+           size_t,
+           FinalLambda,
            bool isRowMajor,
            InType)
   {