cacert: cleanup exporting SSL_CERT_FILE

pkgs/build-support/rust/default.nix

@@ -32,7 +32,7 @@ in stdenv.mkDerivation (args // {
 
   patchRegistryDeps = ./patch-registry-deps;
 
-  buildInputs = [ git rust.cargo rust.rustc ] ++ buildInputs;
+  buildInputs = [ cacert git rust.cargo rust.rustc ] ++ buildInputs;
 
   configurePhase = args.configurePhase or ''
     runHook preConfigure
@@ -60,7 +60,6 @@ in stdenv.mkDerivation (args // {
     unset cargoDepsCopy
 
     export RUST_LOG=${logLevel}
-    export SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt
   '' + (args.postUnpack or "");
 
   buildPhase = with builtins; args.buildPhase or ''

pkgs/build-support/rust/fetchcargo.nix

@@ -19,7 +19,6 @@ stdenv.mkDerivation {
         exit 1
     fi
 
-    export SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt
     export CARGO_HOME=$(mktemp -d cargo-home.XXX)
 
     cargo vendor