Run type checking on multiply_add.py (#6833)

Author: danielhollas

.pre-commit-config.yaml

@@ -188,7 +188,6 @@ repos:
         src/aiida/transports/cli.py|
         src/aiida/transports/plugins/local.py|
         src/aiida/transports/plugins/ssh.py|
-        src/aiida/workflows/arithmetic/multiply_add.py|
       )$
 
   - id: generate-conda-environment

src/aiida/workflows/arithmetic/multiply_add.py

@@ -9,11 +9,9 @@
 # start-marker for docs
 """Implementation of the MultiplyAddWorkChain for testing and demonstration purposes."""
 
+from aiida.calculations.arithmetic.add import ArithmeticAddCalculation
 from aiida.engine import ToContext, WorkChain, calcfunction
 from aiida.orm import AbstractCode, Int
-from aiida.plugins.factories import CalculationFactory
-
-ArithmeticAddCalculation = CalculationFactory('core.arithmetic.add')
 
 
 @calcfunction