apt – Why is my system only looking in /snap for binaries?

I tried to use snap to install node. The package was stale. So, I snap remove‘d that, and I installed node via apt from the nodesource PPA. Great:

$ node -v

However, when I try to use npm, I get the following error:

$ npm
bash: /snap/bin/npm: No such file or directory

This is weird to me, since /usr/bin is on my $PATH and:

$ ls /usr/bin/npm

What has snap done to my system’s normal method of looking for binaries in $PATH?

Also, how do I fix this?