fix: update linking for samples (#8)

Author: JustinBeckwith

packages/google-cloud-redis/.circleci/config.yml

@@ -67,7 +67,6 @@ jobs:
           command: |-
             mkdir -p /home/node/.npm-global
             npm install
-            npm link
             chmod +x node_modules/@google-cloud/nodejs-repo-tools/bin/tools
           environment:
             NPM_CONFIG_PREFIX: /home/node/.npm-global