Added in meteor-extension and now crashing. How to undo this?

I ran “git clone https://github.com/TristanToye/meteor-extension”. I did this because I wanted to make sure that I had the ddp code example at some later time. I had no idea that running this from bash command line would break everything. Here is what I now get when I start my the meteor Hello world demo:

W20170825-05:52:01.052(0)? (STDERR) /home/ubuntu/.meteor/packages/meteor-tool/.1.5.1.puot9a++os.linux.x86_64+web.browser+web.cordova/mt-os.linux.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:280
W20170825-05:52:01.117(0)? (STDERR) throw(ex);
W20170825-05:52:01.118(0)? (STDERR) ^
W20170825-05:52:01.119(0)? (STDERR)
W20170825-05:52:01.121(0)? (STDERR) ReferenceError: MeteorDdp is not defined
W20170825-05:52:01.121(0)? (STDERR) at meteorInstall.server.meteor-extension.js.ddp.meteor-ddp-oauth.js (server/meteor-extension/js/ddp/meteor-ddp-oauth.js:198:1)
W20170825-05:52:01.122(0)? (STDERR) at fileEvaluate (packages/modules-runtime.js:333:9)
W20170825-05:52:01.123(0)? (STDERR) at require (packages/modules-runtime.js:228:16)
W20170825-05:52:01.124(0)? (STDERR) at /home/ubuntu/workspace/myApp/.meteor/local/build/programs/server/app/app.js:582:1
W20170825-05:52:01.125(0)? (STDERR) at /home/ubuntu/workspace/myApp/.meteor/local/build/programs/server/boot.js:338:34
W20170825-05:52:01.126(0)? (STDERR) at Array.forEach (native)
W20170825-05:52:01.127(0)? (STDERR) at Function..each..forEach (/home/ubuntu/.meteor/packages/meteor-tool/.1.5.1.puot9a++os.linux.x86_64+web.browser+web.cordova/mt-os.linux.x86_64/dev_bundle/server-lib/node_modules/underscore/underscore.js:79:11)
W20170825-05:52:01.127(0)? (STDERR) at /home/ubuntu/workspace/myApp/.meteor/local/build/programs/server/boot.js:158:5
W20170825-05:52:01.128(0)? (STDERR) at /home/ubuntu/workspace/myApp/.meteor/local/build/programs/server/boot.js:387:5
W20170825-05:52:01.128(0)? (STDERR) at Function.run (/home/ubuntu/workspace/myApp/.meteor/local/build/programs/server/profile.js:510:12)
=> Exited with code: 1

How can I get back to not having the error?