Revert "openssl, curl, git: Respect $NIX_SSL_CERT_FILE"

This reverts commit 942dbf89c6. Sorry,
this was supposed to go to staging instead of master...

pkgs/tools/networking/curl/default.nix

@@ -25,8 +25,6 @@ stdenv.mkDerivation rec {
     sha256 = "1v6q83qsrf7dgp3y5fa5vkppgqyy82pnsk8z9b4047b6fvclfwvv";
   };
 
-  patches = [ ./nix-ssl-cert-file.patch ];
-
   outputs = [ "bin" "dev" "out" "man" "devdoc" ];
 
   nativeBuildInputs = [ pkgconfig perl ];

pkgs/tools/networking/curl/nix-ssl-cert-file.patch

@@ -1,14 +0,0 @@
-diff -ru -x '*~' curl-7.50.3-orig/src/tool_operate.c curl-7.50.3/src/tool_operate.c
---- curl-7.50.3-orig/src/tool_operate.c	2016-09-06 23:25:06.000000000 +0200
-+++ curl-7.50.3/src/tool_operate.c	2016-10-14 11:51:48.999943142 +0200
-@@ -269,7 +269,9 @@
-         capath_from_env = true;
-       }
-       else {
--        env = curlx_getenv("SSL_CERT_FILE");
-+        env = curlx_getenv("NIX_SSL_CERT_FILE");
-+        if(!env)
-+          env = curlx_getenv("SSL_CERT_FILE");
-         if(env) {
-           config->cacert = strdup(env);
-           if(!config->cacert) {