Remove no longer used settings

Author: ryonakano

schemas/com.github.alecaddd.sequeler.gschema.xml.in

@@ -54,12 +54,6 @@
 			<description>Automatically Save a Quick Connections into the Database Library.</description>
 		</key>
 
-		<key name="dark-theme" type="b">
-			<default>false</default>
-			<summary>Use dark theme</summary>
-			<description>Switch between Light and Dark theme.</description>
-		</key>
-
 		<key name="version" type="s">
 			<default>""</default>
 			<summary>Current Version</summary>

src/Services/Settings.vala

@@ -52,10 +52,6 @@ public class Sequeler.Services.Settings : GLib.Settings {
         get { return get_int ("limit-results"); }
         set { set_int ("limit-results", value); }
     }
-    public bool dark_theme {
-        get { return get_boolean ("dark-theme"); }
-        set { set_boolean ("dark-theme", value); }
-    }
     public bool save_quick {
         get { return get_boolean ("save-quick"); }
         set { set_boolean ("save-quick", value); }

src/Window.vala

@@ -60,8 +60,6 @@ public class Sequeler.Window : Gtk.ApplicationWindow {
     }
 
     private void build_ui () {
-        Gtk.Settings.get_default ().gtk_application_prefer_dark_theme = settings.dark_theme;
-
         var css_provider = new Gtk.CssProvider ();
         css_provider.load_from_resource ("/com/github/alecaddd/sequeler/stylesheet.css");