Update README.md (#194)

* Update README.md

Removing Nvidia support since rocSPARSE  does not support Nvidia platforms.

Libraries/rocSPARSE/README.md

@@ -2,7 +2,7 @@
 
 ## Summary
 
-The examples in this subdirectory showcase the functionality of the [rocSPARSE](https://github.com/rocmSoftwarePlatform/rocSPARSE) library. The examples build on both Linux and Windows for both the ROCm (AMD GPU) and CUDA (NVIDIA GPU) backend.
+The examples in this subdirectory showcase the functionality of the [rocSPARSE](https://github.com/rocmSoftwarePlatform/rocSPARSE) library. The examples build on both Linux and Windows for the ROCm (AMD GPU) backend.
 
 ## Note on asynchronous execution
 
@@ -16,14 +16,12 @@ All rocSPARSE library functions, unless otherwise stated, are non blocking and e
 
   - OR GNU Make - available via the distribution's package manager
 
-- [ROCm](https://rocm.docs.amd.com/projects/HIP/en/latest/install/install.html) (at least version 6.x.x) OR the HIP Nvidia runtime (on the CUDA platform)
+- [ROCm](https://rocm.docs.amd.com/projects/HIP/en/latest/install/install.html) (at least version 6.x.x)
 
 - [rocSPARSE](https://github.com/rocmSoftwarePlatform/rocSPARSE)
 
   - ROCm platform: `rocsparse` package available from [repo.radeon.com](https://repo.radeon.com/rocm/). The repository is added during the standard ROCm [install procedure](https://rocm.docs.amd.com/projects/HIP/en/latest/install/install.html).
 
-  - CUDA platform: Install rocSPARSE from source: [instructions](https://rocm.docs.amd.com/projects/rocSPARSE/en/latest/install/Linux_Install_Guide.html).
-
 ### Windows
 
 - [Visual Studio](https://visualstudio.microsoft.com/) 2019 or 2022 with the "Desktop Development with C++" workload
@@ -35,7 +33,6 @@ All rocSPARSE library functions, unless otherwise stated, are non blocking and e
 - [rocSPARSE](https://github.com/rocmSoftwarePlatform/rocSPARSE)
 
   - ROCm platform: Installed as part of the ROCm SDK on Windows.
-  - CUDA platform: Install rocSPARSE from source: [instructions](https://rocm.docs.amd.com/projects/rocSPARSE/en/latest/install/Linux_Install_Guide.html).
 
 - [CMake](https://cmake.org/download/) (optional, to build with CMake. Requires at least version 3.21)
 
@@ -52,15 +49,15 @@ Make sure that the dependencies are installed, or use the [provided Dockerfiles]
 All examples in the `rocSPARSE` subdirectory can either be built by a single CMake project or be built independently.
 
 - `$ cd Libraries/rocSPARSE`
-- `$ cmake -S . -B build` (on ROCm) or `$ cmake -S . -B build -D GPU_RUNTIME=CUDA` (on CUDA)
+- `$ cmake -S . -B build` (on ROCm)
 - `$ cmake --build build`
 
 #### Using Make
 
 All examples can be built by a single invocation to Make or be built independently.
 
 - `$ cd Libraries/rocSPARSE`
-- `$ make` (on ROCm) or `$ make GPU_RUNTIME=CUDA` (on CUDA)
+- `$ make`
 
 ### Windows