jsoncpp: remove unused 1.6 version

pkgs/development/libraries/jsoncpp/1.6.5/default.nix

@@ -1,48 +0,0 @@
-{ stdenv, fetchFromGitHub, cmake, python }:
-
-stdenv.mkDerivation rec {
-  name = "jsoncpp-${version}";
-  version = "1.6.5";
-
-  src = fetchFromGitHub {
-    owner = "open-source-parsers";
-    repo = "jsoncpp";
-    rev = version;
-    sha256 = "08y54n4v3q18ik8iv8zyziava3x130ilzf1l3qli3vjwf6l42fm0";
-  };
-
-  /* During darwin bootstrap, we have a cp that doesn't understand the
-   * --reflink=auto flag, which is used in the default unpackPhase for dirs
-   */
-  unpackPhase = ''
-    cp -a ${src} ${src.name}
-    chmod -R +w ${src.name}
-    export sourceRoot=${src.name}
-  '';
-
-  # Hack to be able to run the test, broken because we use
-  # CMAKE_SKIP_BUILD_RPATH to avoid cmake resetting rpath on install
-  preBuild = ''
-    export LD_LIBRARY_PATH="`pwd`/src/lib_json:$LD_LIBRARY_PATH"
-  '';
-
-  nativeBuildInputs = [ cmake python ];
-
-  CXXFLAGS = "-Wno-shift-negative-value";
-
-  cmakeFlags = [
-    "-DJSONCPP_LIB_BUILD_SHARED=ON"
-    "-DJSONCPP_LIB_BUILD_STATIC=OFF"
-    "-DJSONCPP_WITH_CMAKE_PACKAGE=ON"
-  ];
-
-  meta = {
-    inherit version;
-    homepage = https://github.com/open-source-parsers/jsoncpp;
-    description = "A simple API to manipulate JSON data in C++";
-    maintainers = with stdenv.lib.maintainers; [ ttuegel cpages ];
-    platforms = stdenv.lib.platforms.all;
-    license = stdenv.lib.licenses.mit;
-    branch = "1.6";
-  };
-}

pkgs/top-level/all-packages.nix

@@ -7746,8 +7746,6 @@ with pkgs;
 
   jsoncpp = callPackage ../development/libraries/jsoncpp { };
 
-  jsoncpp_1_6_5 = callPackage ../development/libraries/jsoncpp/1.6.5 { };
-
   jsonnet = callPackage ../development/compilers/jsonnet { };
 
   libjson = callPackage ../development/libraries/libjson { };