The Jargon File (version 4.4.7, 29 Dec 2003):

featurectomy
 /fee`ch@r?ek't@?mee/, n.

    The act of removing a feature from a program. Featurectomies come in two
    flavors, the righteous and the reluctant. Righteous featurectomies are
    performed because the remover believes the program would be more elegant
    without the feature, or there is already an equivalent and better way to
    achieve the same end. (Doing so is not quite the same thing as removing a 
    misfeature.) Reluctant featurectomies are performed to satisfy some
    external constraint such as code size or execution speed.


The Free On-line Dictionary of Computing (30 December 2018):

featurectomy

   /fee"ch*r-ek"t*-mee/ The act of removing a feature from a
   program.  Featurectomies come in two flavours, the "righteous"
   and the "reluctant".  Righteous featurectomies are performed
   because the remover believes the program would be more elegant
   without the feature, or there is already an equivalent and
   better way to achieve the same end.  (Doing so is not quite
   the same thing as removing a misfeature.)  Reluctant
   featurectomies are performed to satisfy some external
   constraint such as code size or execution speed.

   [Jargon File]

   (1994-10-20)