[572114] refine the preview server runtime classpath
diff --git a/plugins/org.eclipse.wst.server.preview.adapter/src/org/eclipse/wst/server/preview/adapter/internal/core/PreviewLaunchConfigurationDelegate.java b/plugins/org.eclipse.wst.server.preview.adapter/src/org/eclipse/wst/server/preview/adapter/internal/core/PreviewLaunchConfigurationDelegate.java
index cba0315..b5b221c 100644
--- a/plugins/org.eclipse.wst.server.preview.adapter/src/org/eclipse/wst/server/preview/adapter/internal/core/PreviewLaunchConfigurationDelegate.java
+++ b/plugins/org.eclipse.wst.server.preview.adapter/src/org/eclipse/wst/server/preview/adapter/internal/core/PreviewLaunchConfigurationDelegate.java
@@ -53,7 +53,6 @@
 		"org.slf4j.api",
 		"org.eclipse.jetty.http",
 		"org.eclipse.jetty.io",
-		"org.eclipse.jetty.osgi.boot",
 		"org.eclipse.jetty.security",
 		"org.eclipse.jetty.server",
 		"org.eclipse.jetty.servlet",