removing the change for input_array...

Author: veljanin

pandas/core/dtypes/cast.py

@@ -1151,10 +1151,7 @@ def convert_dtypes(
             else:
                 pa_type = to_pyarrow_type(base_dtype)
             if pa_type is not None:
-                if isna(input_array).all() and hasattr(input_array, "categories"):
-                    inferred_dtype = input_array.dtype
-                else:
-                    inferred_dtype = ArrowDtype(pa_type)
+                inferred_dtype = ArrowDtype(pa_type)
 
     elif dtype_backend == "numpy_nullable" and isinstance(inferred_dtype, ArrowDtype):
         # GH 53648