Features removed from the C++ library in this release were also removed from these werappers; see lballabio/QuantLib-SWIG#754 for a full list.
Other features were removed from the wrappers after being deprecated for a long while; see lballabio/QuantLib-SWIG#756.
Finally, a few unused classes were also removed; see lballabio/QuantLib-SWIG#749.
All the pull requests merged in this release are listed on its release page at https://github.com/lballabio/QuantLib-SWIG/releases/tag/v1.40.
The list of commits since the previous release is available in ChangeLog.txt.