Revert "samples: update getSecret sample to include version (#311)" (#313)

This reverts commit ddf8546fa576b36c6094e73aad8181c102ff5f41.

Author: Benjamin E. Coe

secret-manager/getSecret.js

@@ -19,7 +19,7 @@ async function main(name = 'projects/my-project/secrets/my-secret') {
   /**
    * TODO(developer): Uncomment these variables before running the sample.
    */
-  // const name = 'projects/my-project/secrets/my-secret/versions/my-version';
+  // const name = 'projects/my-project/secrets/my-secret';
 
   // Imports the Secret Manager library
   const {SecretManagerServiceClient} = require('@google-cloud/secret-manager');