treewide: remove dead nix references

mail-server/dovecot.nix

@@ -39,27 +39,6 @@ let
       );
 
   postfixCfg = config.services.postfix;
-  dovecot2Cfg = config.services.dovecot2;
-
-  stateDir = "/var/lib/dovecot";
-
-  pipeBin = pkgs.stdenv.mkDerivation {
-    name = "pipe_bin";
-    src = ./dovecot/pipe_bin;
-    buildInputs = with pkgs; [ makeWrapper coreutils bash rspamd ];
-    buildCommand = ''
-      mkdir -p $out/pipe/bin
-      cp $src/* $out/pipe/bin/
-      chmod a+x $out/pipe/bin/*
-      patchShebangs $out/pipe/bin
-
-      for file in $out/pipe/bin/*; do
-        wrapProgram $file \
-          --set PATH "${pkgs.coreutils}/bin:${pkgs.rspamd}/bin"
-      done
-    '';
-  };
-
 
   ldapConfig = pkgs.writeTextFile {
     name = "dovecot-ldap.conf.ext.template";
@@ -109,7 +88,7 @@ let
     # Prevent world-readable password files, even temporarily.
     umask 077
 
-    for f in ${builtins.toString (lib.mapAttrsToList (name: value: passwordFiles."${name}") cfg.loginAccounts)}; do
+    for f in ${builtins.toString (lib.mapAttrsToList (name: _: passwordFiles."${name}") cfg.loginAccounts)}; do
       if [ ! -f "$f" ]; then
         echo "Expected password hash file $f does not exist!"
         exit 1
@@ -117,7 +96,7 @@ let
     done
 
     cat <<EOF > ${passwdFile}
-    ${lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value:
+    ${lib.concatStringsSep "\n" (lib.mapAttrsToList (name: _:
       "${name}:${"$(head -n 1 ${passwordFiles."${name}"})"}::::::"
     ) cfg.loginAccounts)}
     EOF
@@ -130,7 +109,7 @@ let
     EOF
   '';
 
-  junkMailboxes = builtins.attrNames (lib.filterAttrs (n: v: v ? "specialUse" && v.specialUse == "Junk") cfg.mailboxes);
+  junkMailboxes = builtins.attrNames (lib.filterAttrs (_: v: v ? "specialUse" && v.specialUse == "Junk") cfg.mailboxes);
   junkMailboxNumber = builtins.length junkMailboxes;
   # The assertion garantees there is exactly one Junk mailbox.
   junkMailboxName = if junkMailboxNumber == 1 then builtins.elemAt junkMailboxes 0 else "";