Don't add remote fork on create

.devcontainer/on-create-command.sh

@@ -1,10 +1,6 @@
 #!/bin/bash
 set -e
 
-if ! git remote | grep -q "fork"; then
-    git remote add fork https://github.com/${GITHUB_USER}/flask
-fi
-
 python3 -m venv .venv
 . .venv/bin/activate
 pip install --upgrade pip setuptools