diff --git a/bundles/org.eclipse.e4.ui.css.swt.theme/build.properties b/bundles/org.eclipse.e4.ui.css.swt.theme/build.properties
index 939f3ec5460..763d5179ae7 100644
--- a/bundles/org.eclipse.e4.ui.css.swt.theme/build.properties
+++ b/bundles/org.eclipse.e4.ui.css.swt.theme/build.properties
@@ -15,7 +15,6 @@ output.. = bin/
 bin.includes = META-INF/,\
                .,\
                plugin.xml,\
-               css/,\
                OSGI-INF/,\
                about.html,\
                plugin.properties
diff --git a/bundles/org.eclipse.e4.ui.css.swt.theme/css/dummy.css b/bundles/org.eclipse.e4.ui.css.swt.theme/css/dummy.css
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/BootstrapTheme3x.java b/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/BootstrapTheme3x.java
deleted file mode 100644
index 0f6f7d83f69..00000000000
--- a/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/BootstrapTheme3x.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2010, 2014 Tom Schindl and others.
- *
- * This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License 2.0
- * which accompanies this distribution, and is available at
- * https://www.eclipse.org/legal/epl-2.0/
- *
- * SPDX-License-Identifier: EPL-2.0
- *
- * Contributors:
- *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
- *******************************************************************************/
-package org.eclipse.e4.ui.css.swt.internal.theme;
-
-import org.eclipse.e4.ui.css.swt.theme.ITheme;
-import org.eclipse.e4.ui.css.swt.theme.IThemeEngine;
-import org.eclipse.e4.ui.css.swt.theme.IThemeManager;
-import org.eclipse.swt.widgets.Display;
-import org.osgi.framework.Bundle;
-import org.osgi.framework.BundleContext;
-import org.osgi.framework.FrameworkUtil;
-import org.osgi.framework.ServiceReference;
-
-/*
- * ATTENTION WHEN RENAMING, REMOVING, ... you need to update 3.x org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/Workbench.java
- */
-/**
- * This class allows 3.x code to bootstrap the themes engine with having a real dependency on it
- */
-public class BootstrapTheme3x {
-	public BootstrapTheme3x(Display display) {
-		this(display, null);
-	}
-
-	public BootstrapTheme3x(Display display, String themeId) {
-		Bundle bundle = FrameworkUtil.getBundle(BootstrapTheme3x.class);
-		BundleContext context = bundle.getBundleContext();
-		ServiceReference<IThemeManager> ref = context
-				.getServiceReference(IThemeManager.class);
-		IThemeManager mgr = context.getService(ref);
-		final IThemeEngine engine = mgr.getEngineForDisplay(display);
-		ITheme theme = engine.registerTheme(IThemeEngine.DEFAULT_THEME_ID, "Default Theme", "platform:/plugin/org.eclipse.e4.ui.css.swt.theme/css/dummy.css");
-		if( themeId == null ) {
-			engine.setTheme(theme, false);
-		} else {
-			engine.setTheme(themeId, false);
-		}
-	}
-}
\ No newline at end of file