Remove nvm to speed build time

The Dockerfile already pulls the node:12 image, so there's no need for NVM to be downloaded and installed as well. Removing this speeds up the image build time (making Github Actions go faster)

entrypoint.sh

@@ -3,20 +3,8 @@
 set -e
 
 export HOME="/github/workspace"
-export NVM_DIR="/github/workspace/nvm"
 export WRANGLER_HOME="/github/workspace"
 
-curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.0/install.sh | bash
-
-# Comments beginning with "shellcheck" use shellcheck, a shell script linter.
-# The below comments ignore shellcheck linting on the instructions provided
-# by NVM.
-
-# shellcheck source=/dev/null
-[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
-# shellcheck source=/dev/null
-[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"
-
 mkdir -p "$HOME/.wrangler"
 chmod -R 770 "$HOME/.wrangler"