lib: remove version variable from getVersion (cloudevents#163)

This commit removes the version variable from getVersion and updates the
code to use return statements to be consistent with other functions in
this file, like getMode and accept.

Signed-off-by: Daniel Bevenius <[email protected]>

Author: danbev

lib/bindings/http/http_receiver.js

@@ -68,18 +68,18 @@ function getMode(headers) {
 }
 
 function getVersion(mode, headers, body) {
-  let version = SPEC_V1; // default to 1.0
-
   if (mode === "binary") {
     // Check the headers for the version
     const versionHeader = headers[DEFAULT_SPEC_VERSION_HEADER];
-    if (versionHeader) { version = versionHeader; }
+    if (versionHeader) {
+      return versionHeader;
+    }
   } else {
     // structured mode - the version is in the body
-    version = body instanceof String
+    return body instanceof String
       ? JSON.parse(body).specversion : body.specversion;
   }
-  return version;
+  return SPEC_V1;
 }
 
 module.exports = HTTPReceiver;