Fix dead code in generated update companions

moor/example/example.g.dart

@@ -87,7 +87,6 @@ class CategoriesCompanion implements UpdateCompanion<Category> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -277,7 +276,6 @@ class RecipesCompanion implements UpdateCompanion<Recipe> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -478,7 +476,6 @@ class IngredientsCompanion implements UpdateCompanion<Ingredient> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -675,7 +672,6 @@ class IngredientInRecipesCompanion
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 

moor/test/data/tables/todos.g.dart

@@ -146,7 +146,6 @@ class TodosTableCompanion implements UpdateCompanion<TodoEntry> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -352,7 +351,6 @@ class CategoriesCompanion implements UpdateCompanion<Category> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -567,7 +565,6 @@ class UsersCompanion implements UpdateCompanion<User> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -767,7 +764,6 @@ class SharedTodosCompanion implements UpdateCompanion<SharedTodo> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 
@@ -931,7 +927,6 @@ class TableWithoutPKCompanion implements UpdateCompanion<TableWithoutPKData> {
         throw ArgumentError(
             'Hit an invalid state while serializing data. Did you run the build step?');
     }
-    ;
   }
 }
 

moor_generator/lib/src/writer/update_companion_writer.dart

@@ -48,6 +48,6 @@ class UpdateCompanionWriter {
       ..write('default: throw ArgumentError('
           "'Hit an invalid state while serializing data. Did you run the build "
           "step?');")
-      ..write('};}\n');
+      ..write('}\n}\n');
   }
 }