certificate-transparency: remove package

The package has been broken for months now.  The issue is due to linker
flags for protobuf, but I can't work it out.

I no longer use this package myself; and I suspect there is little
appetite for keeping it.  So let's remove it and reduce the maintenance
burden.

pkgs/servers/certificate-transparency/default.nix

@@ -1,57 +0,0 @@
-{ stdenv, pkgs, ...}:
-
-stdenv.mkDerivation rec {
-  name = "certificate-transparency-${version}";
-
-  version = "2016-01-14";
-  rev = "250672b5aef3666edbdfc9a75b95a09e7a57ed08";
-
-  meta = with stdenv.lib; {
-    homepage = https://www.certificate-transparency.org/;
-    description = "Auditing for TLS certificates";
-    license = licenses.asl20;
-    platforms = platforms.unix;
-    maintainers = with maintainers; [ philandstuff ];
-  };
-
-  src = pkgs.fetchFromGitHub {
-    owner = "google";
-    repo  = "certificate-transparency";
-    rev   = rev;
-    sha256 = "1gn0bqzkf09jvc2aq3da8fwhl65y7q57msqsh6iczvd6fdmrpfdj";
-  };
-
-  # need to disable regex support in evhtp or building will fail
-  libevhtp_without_regex = stdenv.lib.overrideDerivation pkgs.libevhtp
-    (oldAttrs: {
-      cmakeFlags="-DEVHTP_DISABLE_REGEX:STRING=ON -DCMAKE_C_FLAGS:STRING=-fPIC";
-    });
-
-  buildInputs = with pkgs; [
-    autoconf automake clang_34 pkgconfig
-    glog gmock google-gflags gperftools gtest json_c leveldb
-    libevent libevhtp_without_regex openssl protobuf sqlite
-  ];
-
-  patches = [
-    ./protobuf-include-from-env.patch
-  ];
-
-  doCheck = false;
-
-  preConfigure = ''
-    ./autogen.sh
-    configureFlagsArray=(
-      CC=clang
-      CXX=clang++
-      GMOCK_DIR=${pkgs.gmock}
-      GTEST_DIR=${pkgs.gtest}
-    )
-  '';
-
-  # the default Makefile constructs BUILD_VERSION from `git describe`
-  # which isn't available in the nix build environment
-  makeFlags = "BUILD_VERSION=${version}-${rev}";
-
-  protocFlags = "-I ${pkgs.protobuf}/include";
-}

pkgs/servers/certificate-transparency/protobuf-include-from-env.patch

@@ -1,14 +0,0 @@
-Get protobuf include path from environment
-
---- a/python/Makefile
-+++ b/python/Makefile
-@@ -5,7 +5,7 @@ all: ct/proto/client_pb2.py ct/proto/ct_pb2.py ct/proto/tls_options_pb2.py \
- 	ct/proto/test_message_pb2.py ct/proto/certificate_pb2.py
- 
- ct/proto/%_pb2.py: ct/proto/%.proto
--	$(PROTOC) $^ -I/usr/include/ -I/usr/local/include -I$(INSTALL_DIR)/include -I. --python_out=.
-+	$(PROTOC) $^ $(protocFlags) -I. --python_out=.
- 
- ct/proto/ct_pb2.py: ../proto/ct.proto
- 	$(PROTOC) --python_out=ct/proto -I../proto ../proto/ct.proto
-

pkgs/top-level/all-packages.nix

@@ -666,8 +666,6 @@ in
 
   gcdemu = callPackage ../misc/emulators/cdemu/gui.nix { };
 
-  certificate-transparency = callPackage ../servers/certificate-transparency { };
-
   image-analyzer = callPackage ../misc/emulators/cdemu/analyzer.nix { };
 
   ccnet = callPackage ../tools/networking/ccnet { };