fix test_freeze

tests/nbackend/kernelcreation/test_freeze.py

-#%%
 import sympy as sp
 import pymbolic.primitives as pb
 
@@ -66,6 +65,3 @@ def test_freeze_fields():
     should = PsAssignment(PsLvalueExpr(lhs), PsExpression(rhs))
 
     assert fasm == should
-
-#%%
-test_freeze_fields()
\ No newline at end of file