Move nested functions

app/routes/reading.py

@@ -1,12 +1,10 @@
-from collections import defaultdict
 from flask import Blueprint, render_template, redirect, request, url_for, flash
-import humanize
 from pytz import timezone, utc
-from sqlalchemy import func
 from app.models import Reading, db
-from app.forms import DeleteForm, ReadingForm
+from app.forms import ReadingForm
 from flask_login import login_required, current_user
-from datetime import date, datetime, timedelta
+from datetime import datetime
+
 reading = Blueprint('reading', __name__)
 
 @reading.route('/add', methods=['GET', 'POST'])