removed vanilla clang for time being

.travis.yml

@@ -27,17 +27,6 @@ matrix:
           packages:
             - gcc@7
             - *macos_packages
-    - os: osx
-      name: "macOS with vanilla Clang"
-      osx_image: xcode10.2
-      env:
-        - MATRIX_EVAL="CC=/usr/local/opt/llvm/bin/clang && CXX=/usr/local/opt/llvm/bin/clang++"
-      addons:
-        homebrew:
-          packages:
-            - llvm
-            - libomp
-            - *macos_packages
     - os: osx
       name: "macOS with AppleClang"
       osx_image: xcode10.2

CMakeLists.txt

@@ -23,15 +23,7 @@ project(sparse2d)
   endif()
   message(STATUS "Installing to: ${CMAKE_INSTALL_PREFIX}")
 
-  # Find OpenMP
-  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-      set(OpenMP_CXX "${CMAKE_CXX_COMPILER}")
-      set(OpenMP_CXX_FLAGS "-fopenmp=libomp -Wno-unused-command-line-argument")
-      set(OpenMP_CXX_LIB_NAMES "libomp" "libgomp" "libiomp5")
-      set(OpenMP_libomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
-      set(OpenMP_libgomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
-      set(OpenMP_libiomp5_LIBRARY ${OpenMP_CXX_LIB_NAMES})
-  elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
+  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
     set(OpenMP_INCLUDE_PATH "/usr/local/include")
     set(OpenMP_LIB_PATH "/usr/local/lib")
     set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -lomp")