TYP: remove problematic runtime code from a .pyi test module

Author: jorenham

numpy/typing/tests/data/reveal/nbit_base_example.pyi

@@ -7,8 +7,7 @@ from numpy._typing import _32Bit, _64Bit
 T1 = TypeVar("T1", bound=npt.NBitBase)  # type: ignore[deprecated]  # pyright: ignore[reportDeprecated]
 T2 = TypeVar("T2", bound=npt.NBitBase)  # type: ignore[deprecated]  # pyright: ignore[reportDeprecated]
 
-def add(a: np.floating[T1], b: np.integer[T2]) -> np.floating[T1 | T2]:
-    return a + b
+def add(a: np.floating[T1], b: np.integer[T2]) -> np.floating[T1 | T2]: ...
 
 i8: np.int64
 i4: np.int32