Removed requirements.txt in favor of Pipenv

script/bootstrap

@@ -6,11 +6,8 @@ set -e
 # Ensure we are in the app root directory (not the /script directory)
 cd "$(dirname "${0}")/.."
 
-# Activate virtual environment
-source .venv/bin/activate
-
 # Install Python dependencies
-pip install -r requirements.txt
+pipenv install --dev
 
 # Install uswds node module and dependencies
 npm install