removed StrokeData table and all references to it

rowers/urls.py

@@ -7,7 +7,7 @@ from django.conf.urls import url, include
 from django.urls import path, re_path
 from django.contrib.auth.models import User
 from django.contrib.auth.decorators import login_required, permission_required
-from rowers.models import Workout,Rower,StrokeData,FavoriteChart
+from rowers.models import Workout,Rower,FavoriteChart
 
 from rest_framework import routers, serializers, viewsets,permissions
 from rest_framework.urlpatterns import format_suffix_patterns