Fix redundant tick field

vrobbler/apps/books/migrations/0009_alter_book_run_time.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-03-12 01:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("books", "0008_book_first_sentence"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="book",
+            name="run_time",
+            field=models.IntegerField(blank=True, null=True),
+        ),
+    ]

vrobbler/apps/books/migrations/0010_rename_run_time_book_run_time_seconds.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-03-12 01:21
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("books", "0009_alter_book_run_time"),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name="book",
+            old_name="run_time",
+            new_name="run_time_seconds",
+        ),
+    ]