Use authKey from action parameters (#176)

diff --git a/action/lib/common.js b/action/lib/common.js
index b24e5dd..9f98fbe 100644
--- a/action/lib/common.js
+++ b/action/lib/common.js
@@ -50,7 +50,6 @@
     delete webparams.apihost;
 
     webparams.triggerName = triggerName;
-    webparams.authKey = process.env.__OW_API_KEY;
     config.addAdditionalData(webparams);
 
     return webparams;