Remove complex.nc from built docs (#3353)

* Rolling back to prevent a different issue from leaking into this one.

* Amended what's new.

Author: gwgundersen

doc/io.rst

@@ -516,6 +516,11 @@ and currently raises a warning unless ``invalid_netcdf=True`` is set:
     # Reading it back
     xr.open_dataarray("complex.nc", engine="h5netcdf")
 
+.. ipython:: python
+    :suppress:
+
+    import os
+    os.remove('complex.nc')
 
 .. warning::
 

doc/whats-new.rst

@@ -33,6 +33,10 @@ Documentation
 - Add examples for :py:meth:`Dataset.swap_dims` and :py:meth:`DataArray.swap_dims`.
   By `Justus Magin <https://github.com/keewis>`_.
 
+- Fixed documentation to clean up an unwanted file created in ``ipython`` example
+  (:pull:`3353`).
+  By `Gregory Gundersen <https://github.com/gwgundersen/>`_.
+
 .. _whats-new.0.13.0:
 
 v0.13.0 (17 Sep 2019)