Use authKey from action parameters (#196)

diff --git a/actions/event-actions/lib/common.js b/actions/event-actions/lib/common.js
index e5ba69a..f02dc18 100644
--- a/actions/event-actions/lib/common.js
+++ b/actions/event-actions/lib/common.js
@@ -48,7 +48,6 @@
     delete webparams.apihost;
 
     webparams.triggerName = triggerName;
-    webparams.authKey = process.env.__OW_API_KEY;
     config.addAdditionalData(webparams);
 
     return webparams;