remove ivtools line. mistakenly added during merge branch?

Author: RDaxini

docs/sphinx/source/whatsnew/v0.12.1.rst

@@ -14,7 +14,6 @@ Bug fixes
 
 Enhancements
 ~~~~~~~~~~~~
-* ``pvlib.ivtools.sdm`` is now a subpackage. (:issue:`2252`, :pull:`2256`)
 * :py:mod:`pvlib.ivtools.sdm` is now a subpackage. (:issue:`2252`, :pull:`2256`)
 * Add a function for estimating PVsyst SDM parameters from IEC 61853-1 matrix
   data (:py:func:`~pvlib.ivtools.sdm.fit_pvsyst_iec61853_sandia_2025`). (:issue:`2185`, :pull:`2429`)