Remove unused clang nix file

bsc/llvm-ompss2/clang-bad.nix

@@ -1,69 +0,0 @@
-{
-  stdenv
-, fetchgit
-, cmake
-, lld
-, bash
-, python3
-, perl
-, clang
-, which
-, libelf
-, libffi
-, pkg-config
-, enableDebug ? false
-}:
-
-stdenv.mkDerivation rec {
-  version = "11.0.0";
-  pname = "clang-ompss2";
-  enableParallelBuilding = true;
-  isClang = true;
-  isClangWithOmpss = true;
-
-  buildInputs = [
-    which
-    clang
-    bash
-    python3
-    perl
-    cmake
-    lld
-    libelf
-    libffi
-    pkg-config
-  ];
-
-  hardeningDisable = [ "fortify" ];
-
-  cmakeBuildType = if enableDebug then "Debug" else "Release";
-
-  dontUseCmakeBuildDir = true;
-
-  preConfigure = ''
-    mkdir -p build
-    cd build
-  '';
-
-  cmakeDir="../llvm";
-  cmakeFlagsArray=[
-    "-DLLVM_ENABLE_LLD=ON"
-    "-DCMAKE_CXX_FLAGS_DEBUG=-g -ggnu-pubnames"
-    "-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,-gdb-index"
-    "-DLLVM_LIT_ARGS=-sv --xunit-xml-output=xunit.xml"
-    "-DLLVM_ENABLE_PROJECTS=clang;openmp;compiler-rt"
-    "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
-    (if enableDebug then "-DLLVM_ENABLE_ASSERTIONS=ON" else "")
-  ];
-
-# About "-DCLANG_DEFAULT_NANOS6_HOME=${nanos6}", we could specify a default
-# nanos6 installation, but this is would require a recompilation of clang each
-# time nanos6 is changed. Better to use the environment variable NANOS6_HOME,
-# and specify nanos6 at run time.
-
-  src = builtins.fetchGit {
-    url = "ssh://git@bscpm02.bsc.es/llvm-ompss/llvm-mono.git";
-    rev = "e1c73c3691d2685a99d99e14c6110d2c880662c6";
-    ref = "master";
-  };
-}