couchdb2: drop

nixos/modules/services/databases/couchdb.nix

@@ -4,24 +4,17 @@ with lib;
 
 let
   cfg = config.services.couchdb;
-  useVersion2 = strings.versionAtLeast (strings.getVersion cfg.package) "2.0";
   configFile = pkgs.writeText "couchdb.ini" (
     ''
       [couchdb]
       database_dir = ${cfg.databaseDir}
       uri_file = ${cfg.uriFile}
       view_index_dir = ${cfg.viewIndexDir}
-    '' + (if cfg.adminPass != null then
-    ''
+    '' + (optionalString (cfg.adminPass != null) ''
       [admins]
       ${cfg.adminUser} = ${cfg.adminPass}
-    '' else
-    "") + (if useVersion2 then
-    ''
+    '' + ''
       [chttpd]
-    '' else
-    ''
-      [httpd]
     '') +
     ''
       port = ${toString cfg.port}
@@ -30,8 +23,7 @@ let
       [log]
       file = ${cfg.logFile}
     '');
-  executable = if useVersion2 then "${cfg.package}/bin/couchdb"
-    else ''${cfg.package}/bin/couchdb -a ${configFile} -a ${pkgs.writeText "couchdb-extra.ini" cfg.extraConfig} -a ${cfg.configFile}'';
+  executable = "${cfg.package}/bin/couchdb";
 
 in {
 
@@ -177,8 +169,7 @@ in {
 
     environment.systemPackages = [ cfg.package ];
 
-    services.couchdb.configFile = mkDefault
-      (if useVersion2 then "/var/lib/couchdb/local.ini" else "/var/lib/couchdb/couchdb.ini");
+    services.couchdb.configFile = mkDefault "/var/lib/couchdb/local.ini";
 
     systemd.tmpfiles.rules = [
       "d '${dirOf cfg.uriFile}' - ${cfg.user} ${cfg.group} - -"
@@ -195,7 +186,7 @@ in {
         touch ${cfg.configFile}
       '';
 
-      environment = mkIf useVersion2 {
+      environment = {
         # we are actually specifying 4 configuration files:
         # 1. the preinstalled default.ini
         # 2. the module configuration