move cleanup to new migration

ErsatzTV.Infrastructure/Migrations/20210220220723_ScheduleCollectionTypes.cs

@@ -112,17 +112,6 @@ namespace ErsatzTV.Infrastructure.Migrations
                 "TelevisionShows",
                 principalColumn: "Id",
                 onDelete: ReferentialAction.Restrict);
-
-            // delete program schedule items that referenced television collections (that no longer exist)
-            migrationBuilder.Sql(
-                "delete from ProgramScheduleItems where MediaCollectionId not in (select Id from SimpleMediaCollections)");
-            
-            // delete television collections that no longer exist/work
-            migrationBuilder.Sql(
-                "delete from MediaCollections where Id not in (select Id from SimpleMediaCollections)");
-            
-            // delete all posters so they are all re-cached with a higher resolution
-            migrationBuilder.Sql("update MediaItems set Poster = null");
         }
 
         protected override void Down(MigrationBuilder migrationBuilder)

ErsatzTV.Infrastructure/Migrations/20210221215810_RemoveScheduleItemsAndPosters.cs

@@ -0,0 +1,25 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace ErsatzTV.Infrastructure.Migrations
+{
+    public partial class RemoveScheduleItemsAndPosters : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // delete program schedule items that referenced television collections (that no longer exist)
+            migrationBuilder.Sql(
+                "delete from ProgramScheduleItems where MediaCollectionId not in (select Id from SimpleMediaCollections)");
+
+            // delete television collections that no longer exist/work
+            migrationBuilder.Sql(
+                "delete from MediaCollections where Id not in (select Id from SimpleMediaCollections)");
+
+            // delete all posters so they are all re-cached with a higher resolution
+            migrationBuilder.Sql("update MediaItems set Poster = null");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+        }
+    }
+}