clean up todos and commented code

bin/steps/pip-install

@@ -60,17 +60,9 @@ if [ ! "$SKIP_PIP_INSTALL" ]; then
         exit 1
     fi
 
-    # Cache pip packages ourselves
-    ## TODO: Update to cache pip's built-in cache
-
-    # # Update cached version of requirements.txt
-    # cp -R $BUILD_DIR/requirements.txt "$CACHE_DIR/.heroku/requirements.txt"
-
     cp requirements.txt .heroku/python/requirements-declared.txt
     /app/.heroku/python/bin/pip freeze --disable-pip-version-check > .heroku/python/requirements-installed.txt
 
-    echo
-
     # Install test dependencies, for CI.
     if [ "$INSTALL_TEST" ]; then
         if [[ -f "$1/requirements-test.txt" ]]; then