mutt: remove options. (#36233)

See https://github.com/Homebrew/homebrew-core/issues/31510.

Formula/mutt.rb

@@ -29,9 +29,9 @@ class Mutt < Formula
 
   depends_on "autoconf" => :build
   depends_on "automake" => :build
+  depends_on "gpgme"
   depends_on "openssl"
   depends_on "tokyo-cabinet"
-  depends_on "gpgme" => :optional
 
   conflicts_with "tin",
     :because => "both install mmdf.5 and mbox.5 man pages"
@@ -54,10 +54,9 @@ class Mutt < Formula
       --with-sasl
       --with-ssl=#{Formula["openssl"].opt_prefix}
       --with-tokyocabinet
+      --enable-gpgme
     ]
 
-    args << "--enable-gpgme" if build.with? "gpgme"
-
     system "./prepare", *args
     system "make"