bind: remove options

Formula/bind.rb

@@ -4,6 +4,7 @@ class Bind < Formula
   url "https://ftp.isc.org/isc/bind9/9.12.2-P2/bind-9.12.2-P2.tar.gz"
   version "9.12.2-P2"
   sha256 "87027826e98bab90ead31f45ce7653cb3116ebe64ab8202a08b6b64531df693e"
+  revision 1
   head "https://gitlab.isc.org/isc-projects/bind9.git"
 
   bottle do
@@ -13,8 +14,8 @@ class Bind < Formula
     sha256 "f1647b9ece6cc0ca08891774487415c28a13ed4d9637f1e60924b885ce7da4b2" => :el_capitan
   end
 
+  depends_on "json-c"
   depends_on "openssl"
-  depends_on "json-c" => :optional
 
   def install
     # Fix "configure: error: xml2-config returns badness"
@@ -25,14 +26,13 @@ class Bind < Formula
     # enable DNSSEC signature chasing in dig
     ENV["STD_CDEFINES"] = "-DDIG_SIGCHASE=1"
 
-    json = build.with?("json-c") ? "yes" : "no"
     system "./configure", "--prefix=#{prefix}",
                           "--enable-threads",
                           "--enable-ipv6",
                           "--with-openssl=#{Formula["openssl"].opt_prefix}",
-                          "--with-libjson=#{json}"
+                          "--with-libjson=yes"
 
-    # From the bind9 README: "Do not use a parallel "make"."
+    # From the bind9 README: "Do not use a parallel "make"
     ENV.deparallelize
     system "make"
     system "make", "install"