Revert "Changing lib.pyx to highlight an issue with astype_unicode (not a fix)"

This reverts commit 3fb43a9.

Author: ThibTrip

pandas/_libs/lib.pyx

@@ -552,7 +552,7 @@ def astype_intsafe(ndarray[object] arr, new_dtype):
 
 @cython.wraparound(False)
 @cython.boundscheck(False)
-def astype_unicode(arr: ndarray, skipna: bool=True) -> ndarray[object]:
+def astype_unicode(arr: ndarray, skipna: bool=False) -> ndarray[object]:
     """
     Convert all elements in an array to unicode.
 
@@ -574,9 +574,6 @@ def astype_unicode(arr: ndarray, skipna: bool=True) -> ndarray[object]:
         Py_ssize_t i, n = arr.size
         ndarray[object] result = np.empty(n, dtype=object)
 
-    # BUG skipna should be True but it is not
-    print(f'skipna value: {skipna}')
-
     for i in range(n):
         arr_i = arr[i]