ycb_sympy_pr19783

what a new run launched now would send

Dagger() * IdentityOperator() is not simplified
As discussed on the mailing list the following does not work.
```
from sympy.physics.quantum.dagger import Dagger
from sympy.physics.quantum.operator import Operator
from sympy.physics.quantum import IdentityOperator
A = Operators('A')
Identity = IdentityOperator()
A * Identity #This gives A, correctly
B = Dagger(A)
B * Identity #This returns A^\dagger I 
```

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