Revert "rethinkdb: Force dynamic linking and allow dependency substitution"

This reverts commit 5960a652f1.

Build is broken since the beginning at configure phase @wkennington ,
I wonder how you were able to build this.

See http://hydra.nixos.org/build/24167778/nixlog/1/raw

pkgs/servers/nosql/rethinkdb/default.nix

@@ -11,21 +11,12 @@ stdenv.mkDerivation rec {
     sha256 = "19qhia4lfa8a0rzp2v6lnlxp2lf4z4vqhgfxnicfdnx07q4r847i";
   };
 
-  postPatch = ''
-    # Remove the dependence on bundled libraries
-    sed -i '/must_fetch_list/ s/ v8//' configure
-
-    # Don't use the default command line args
-    rm configure.default
-  '';
-
   preConfigure = ''
     export ALLOW_WARNINGS=1
     patchShebangs .
   '';
 
   configureFlags = [
-    "--dynamic=all"
     "--with-jemalloc"
     "--lib-path=${jemalloc}/lib"
   ];