gopher: 3.0.18 -> 3.0.19

Also remove the patch, since this release fixes that issue

pkgs/by-name/go/gopher/int_main.patch

@@ -1,13 +0,0 @@
-diff --git a/configure b/configure
-index 1b20711..79ce215 100644
---- a/configure
-+++ b/configure
-@@ -679,7 +679,7 @@ cat > conftest.$ac_ext << EOF
- #line 680 "configure"
- #include "confdefs.h"
- 
--main(){return(0);}
-+int main(){return(0);}
- EOF
- if { (eval echo configure:685: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
-   ac_cv_prog_cc_works=yes

pkgs/by-name/go/gopher/package.nix

@@ -7,21 +7,17 @@
 
 stdenv.mkDerivation rec {
   pname = "gopher";
-  version = "3.0.18";
+  version = "3.0.19";
 
   src = fetchFromGitHub {
     owner = "jgoerzen";
     repo = "gopher";
     rev = "release/${version}";
-    sha256 = "sha256-YAcpEV3SbiUZ4nqYk6k1M41YWdTGSSH7rNB15gv31qQ=";
+    sha256 = "sha256-8J63TnC3Yq7+64PPLrlPEueMa9D/eWkPsb08t1+rPAA=";
   };
 
   buildInputs = [ ncurses ];
 
-  patches = [
-    ./int_main.patch # https://github.com/jgoerzen/gopher/pull/8
-  ];
-
   preConfigure = "export LIBS=-lncurses";
 
   meta = with lib; {