DOC: Remove old SparseDataFrame/SparseSeries references

[topper-123]

SparseDataFrame/SparseSeries were removed in v1.0, so it's time to remove the migration docs.

[mroeschke]

Looks like an example on the page needs fixing

023-03-20T20:08:03.0244572Z WARNING: 
2023-03-20T20:08:03.0245214Z looking for now-outdated files... none found
2023-03-20T20:08:03.0245783Z >>>-------------------------------------------------------------------------
2023-03-20T20:08:03.0246328Z Exception in /home/runner/work/pandas/pandas/doc/source/user_guide/sparse.rst at block ending on line 179
2023-03-20T20:08:03.0260443Z Specify :okexcept: as an option in the ipython:: block to suppress this message
2023-03-20T20:08:03.0261387Z ---------------------------------------------------------------------------
2023-03-20T20:08:03.0261877Z AttributeError                            Traceback (most recent call last)
2023-03-20T20:08:03.0262244Z Cell In[31], line 1
2023-03-20T20:08:03.0262655Z ----> 1 df.sparse.to_dense()
2023-03-20T20:08:03.0262890Z 
2023-03-20T20:08:03.0263632Z File ~/work/pandas/pandas/pandas/core/generic.py:6040, in NDFrame.__getattr__(self, name)
2023-03-20T20:08:03.2253217Z    6033 if (
2023-03-20T20:08:03.2253942Z    6034     name not in self._internal_names_set
2023-03-20T20:08:03.2254318Z    6035     and name not in self._metadata
2023-03-20T20:08:03.2254670Z    6036     and name not in self._accessors
2023-03-20T20:08:03.2255072Z    6037     and self._info_axis._can_hold_identifiers_and_holds_name(name)
2023-03-20T20:08:03.2255425Z    6038 ):
2023-03-20T20:08:03.2255650Z    6039     return self[name]
2023-03-20T20:08:03.2256171Z -> 6040 return object.__getattribute__(self, name)
2023-03-20T20:08:03.2256361Z 
2023-03-20T20:08:03.2256693Z File ~/work/pandas/pandas/pandas/core/accessor.py:224, in CachedAccessor.__get__(self, obj, cls)
2023-03-20T20:08:03.2257100Z     221 if obj is None:
2023-03-20T20:08:03.2257570Z     222     # we're accessing the attribute of the class, i.e., Dataset.geo
2023-03-20T20:08:03.2257990Z     223     return self._accessor
2023-03-20T20:08:03.2258388Z --> 224 accessor_obj = self._accessor(obj)
2023-03-20T20:08:03.2258791Z     225 # Replace the property with the accessor object. Inspired by:
2023-03-20T20:08:03.2259308Z     226 # https://www.pydanny.com/cached-property.html
2023-03-20T20:08:03.2259760Z     227 # We need to use object.__setattr__ because we overwrite __setattr__ on
2023-03-20T20:08:03.2260119Z     228 # NDFrame
2023-03-20T20:08:03.2260407Z     229 object.__setattr__(obj, self._name, accessor_obj)
2023-03-20T20:08:03.2260656Z 
2023-03-20T20:08:03.2282207Z File ~/work/pandas/pandas/pandas/core/arrays/sparse/accessor.py:31, in BaseAccessor.__init__(self, data)
2023-03-20T20:08:03.2295625Z      29 def __init__(self, data=None) -> None:
2023-03-20T20:08:03.2296026Z      30     self._parent = data
2023-03-20T20:08:03.2296416Z ---> 31     self._validate(data)
2023-03-20T20:08:03.2296661Z 
2023-03-20T20:08:03.2297456Z File ~/work/pandas/pandas/pandas/core/arrays/sparse/accessor.py:233, in SparseFrameAccessor._validate(self, data)
2023-03-20T20:08:03.2297912Z     231 dtypes = data.dtypes
2023-03-20T20:08:03.2298293Z     232 if not all(isinstance(t, SparseDtype) for t in dtypes):
2023-03-20T20:08:03.2298786Z --> 233     raise AttributeError(self._validation_msg)
2023-03-20T20:08:03.2299052Z 
2023-03-20T20:08:03.2312025Z AttributeError: Can only use the '.sparse' accessor with Sparse data.
2023-03-20T20:08:03.2312380Z pickling environment... done
2023-03-20T20:08:03.2327053Z 
2023-03-20T20:08:03.2327276Z checking consistency... done
2023-03-20T20:08:03.2370234Z <<<-------------------------------------------------------------------------
2023-03-20T20:08:03.2370670Z WARNING: 
2023-03-20T20:08:03.2371077Z >>>-------------------------------------------------------------------------
2023-03-20T20:08:03.2371612Z Exception in /home/runner/work/pandas/pandas/doc/source/user_guide/sparse.rst at block ending on line 179
2023-03-20T20:08:03.2372179Z Specify :okexcept: as an option in the ipython:: block to suppress this message
2023-03-20T20:08:03.2373059Z ---------------------------------------------------------------------------
2023-03-20T20:08:03.2373808Z AttributeError                            Traceback (most recent call last)
2023-03-20T20:08:03.2374179Z Cell In[32], line 1
2023-03-20T20:08:03.2374578Z ----> 1 df.sparse.to_coo()
2023-03-20T20:08:03.2374820Z 
2023-03-20T20:08:03.2407870Z File ~/work/pandas/pandas/pandas/core/generic.py:6040, in NDFrame.__getattr__(self, name)
2023-03-20T20:08:03.2418060Z    6033 if (
2023-03-20T20:08:03.2418445Z    6034     name not in self._internal_names_set
2023-03-20T20:08:03.2418817Z    6035     and name not in self._metadata
2023-03-20T20:08:03.2419185Z    6036     and name not in self._accessors
2023-03-20T20:08:03.2419575Z    6037     and self._info_axis._can_hold_identifiers_and_holds_name(name)
2023-03-20T20:08:03.2419936Z    6038 ):
2023-03-20T20:08:03.2420173Z    6039     return self[name]
2023-03-20T20:08:03.2420685Z -> 6040 return object.__getattribute__(self, name)
2023-03-20T20:08:03.2420970Z 
2023-03-20T20:08:03.2421241Z File ~/work/pandas/pandas/pandas/core/accessor.py:224, in CachedAccessor.__get__(self, obj, cls)
2023-03-20T20:08:03.2421560Z     221 if obj is None:
2023-03-20T20:08:03.2421945Z     222     # we're accessing the attribute of the class, i.e., Dataset.geo
2023-03-20T20:08:03.2422245Z     223     return self._accessor
2023-03-20T20:08:03.2422606Z --> 224 accessor_obj = self._accessor(obj)
2023-03-20T20:08:03.2422933Z     225 # Replace the property with the accessor object. Inspired by:
2023-03-20T20:08:03.2423375Z     226 # https://www.pydanny.com/cached-property.html
2023-03-20T20:08:03.2423842Z     227 # We need to use object.__setattr__ because we overwrite __setattr__ on
2023-03-20T20:08:03.2424201Z     228 # NDFrame
2023-03-20T20:08:03.2424577Z     229 object.__setattr__(obj, self._name, accessor_obj)
2023-03-20T20:08:03.2424828Z 
2023-03-20T20:08:03.2426446Z File ~/work/pandas/pandas/pandas/core/arrays/sparse/accessor.py:31, in BaseAccessor.__init__(self, data)
2023-03-20T20:08:03.2426841Z preparing documents... done
2023-03-20T20:08:03.2450195Z      29 def __init__(self, data=None) -> None:
2023-03-20T20:08:03.2450595Z      30     self._parent = data
2023-03-20T20:08:03.2450986Z ---> 31     self._validate(data)
2023-03-20T20:08:03.2451217Z 
2023-03-20T20:08:03.2472267Z File ~/work/pandas/pandas/pandas/core/arrays/sparse/accessor.py:233, in SparseFrameAccessor._validate(self, data)
2023-03-20T20:08:03.2472786Z     231 dtypes = data.dtypes
2023-03-20T20:08:03.2473182Z     232 if not all(isinstance(t, SparseDtype) for t in dtypes):
2023-03-20T20:08:03.2473731Z --> 233     raise AttributeError(self._validation_msg)
2023-03-20T20:08:03.2473999Z 
2023-03-20T20:08:03.2474322Z AttributeError: Can only use the '.sparse' accessor with Sparse data.

[topper-123]

I’ve updated.

[mroeschke]

Thanks @topper-123