path64: remove

The project seem to be inactive since 2010 (http://www.path64.org/). The
repository is also unavailable now.

Found at https://github.com/NixOS/nixpkgs/issues/15558.

pkgs/development/compilers/path64/default.nix

@@ -1,35 +0,0 @@
-{stdenv, fetchgit, perl, flex, bison, gmp, mpfr, cmake}:
-
-assert stdenv.system == "x86_64-linux";
-
-stdenv.mkDerivation {
-  name = "path64-2010-07-02";
-
-  src = fetchgit {
-    url = git://github.com/path64/compiler.git;
-    rev = "e17f7f952831bbf1d996";
-    sha256 = "fa1320959e1131557d5f82e98f4621a222ec45e1d6e0e7f271d2c13de4fd0dd1";
-  };
-
-  patchPhase = ''
-    sed -i s,/usr/bin/ld,$(type -P ld), src/driver/phases.c
-    sed -i s,/lib64/ld-linux-x86-64.so.2,${stdenv.cc.libc.out}/lib/ld-linux-x86-64.so.2, src/include/main_defs.h.in
-  '';
-
-  cmakeFlags = ''
-    -DPATH64_ENABLE_HUGEPAGES=ON 
-    -DPATH64_ENABLE_MATHLIBS=ON -DPATH64_ENABLE_OPENMP=ON 
-    -DPATH64_ENABLE_PSCRUNTIME=OFF
-    -DPATH64_ENABLE_PROFILING=OFF -DPATH64_ENABLE_TARGETS=x8664 
-    -DCMAKE_BUILD_TYPE=Debug -DPATH64_ENABLE_FORTRAN=OFF
-    -DPSC_CRT_PATH=${stdenv.cc.libc.out}/lib
-  '';
-
-  makeFlags = "-j4";
-
-  installPhase = ''
-    exit 1; 
-  '';
-
-  buildInputs = [ perl flex bison gmp mpfr cmake ];
-}

pkgs/top-level/all-packages.nix

@@ -4718,8 +4718,6 @@ in
 
   hugs = callPackage ../development/interpreters/hugs { };
 
-  path64 = callPackage ../development/compilers/path64 { };
-
   openjdk7 =
     if stdenv.isDarwin then
       callPackage ../development/compilers/openjdk-darwin { }