Remove old tests written in C++

Author: johnlees

pp_sketch/__main__.py

@@ -1,4 +1,4 @@
-# Copyright 2019-2021 John Lees
+# Copyright 2019-2022 John Lees
 """sketchlib: fast sketching and core/accessory distance estimation from assemblies and reads
 
 Usage:

src/gpu/dist.cu

@@ -491,7 +491,7 @@ std::vector<float> dispatchDists(std::vector<Reference> &ref_sketches,
 
 // Function which sparsifies distances on the fly. Distances are calculated in
 // blocks, sorted and top k stored.
-// NB graph probably not needed as API calls faster than ops here
+// NB cuda graph not needed as API calls faster than ops here
 sparse_coo sparseDists(const dist_params params,
   const std::vector<std::vector<uint64_t>> &ref_sketches,
   const std::vector<SketchStrides> &ref_strides,