Remove duplicate invocation of shell extensions

components/org.apache.stratos.python.cartridge.agent/src/main/python/cartridge.agent/cartridge.agent/modules/event/eventhandler.py

diff --git a/components/org.apache.stratos.python.cartridge.agent/src/main/python/cartridge.agent/cartridge.agent/modules/event/eventhandler.py b/components/org.apache.stratos.python.cartridge.agent/src/main/python/cartridge.agent/cartridge.agent/modules/event/eventhandler.py
index ed64f6e..e44059f 100644
--- a/components/org.apache.stratos.python.cartridge.agent/src/main/python/cartridge.agent/cartridge.agent/modules/event/eventhandler.py
+++ b/components/org.apache.stratos.python.cartridge.agent/src/main/python/cartridge.agent/cartridge.agent/modules/event/eventhandler.py
@@ -508,7 +508,6 @@
         try:
             if self.__extension_executor is not None:
                 self.__log.debug("Executing extension for event [%s]" % event)
-                PluginExecutor(self.__extension_executor, extension_values).start()
                 extension_thread = PluginExecutor(self.__extension_executor, extension_values)
                 extension_thread.start()