update minimum ANARI-SDK version required

.gitlab/ci/docker/ubuntu2004/kokkos/Dockerfile

@@ -57,7 +57,7 @@ RUN mkdir -p /opt/kokkos/build && \
 
 # Build and install ANARI SDK
 WORKDIR /opt/anari/src
-ARG ANARI_VERSION=0.7.1
+ARG ANARI_VERSION=0.8.0
 RUN curl -L https://github.com/KhronosGroup/ANARI-SDK/archive/refs/tags/v$ANARI_VERSION.tar.gz | tar xzv && \
     cmake -GNinja \
       -S ANARI-SDK-$ANARI_VERSION \

vtkm/interop/anari/CMakeLists.txt

@@ -8,7 +8,7 @@
 ##  PURPOSE.  See the above copyright notice for more information.
 ##============================================================================
 
-find_package(anari 0.7.0 REQUIRED)
+find_package(anari 0.8.0 REQUIRED)
 
 set(headers
   ANARIActor.h

vtkm/interop/anari/VtkmANARITypes.h

@@ -22,10 +22,6 @@ namespace anari_cpp = ::anari;
 namespace anari
 {
 
-#if ANARI_SDK_VERSION_MINOR >= 8
-using namespace ::anari::math;
-#endif
-
 /// These declarations let ANARI C++ bindings infer the correct `ANARIDataType`
 /// enum value from VTK-m's C++ math types. This header should be included
 /// before any code which needs this type inference to function.