Remove it, and make very sure it stays removed in future versions of the singular spkg, e.g., by modifying spkg-install so that if it sees surfex class files, it will bomb out with an error.
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SaveMovieDialog$5.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SolitaryPoint$1.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/jv4surfex.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/Project$9.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/Project$11.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/algebra/Polynomial$Term.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/algebra/Polynomial$Factor.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/algebra/Polynomial.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/Defns.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SaveMovieDialog$2.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SaveMovieDialog$removeListener.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SavePic.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SaveMovieDialog$6.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/pcalc.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/ConfigFrame$3.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/Equation.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/surfex$1.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/LampAdmin$2.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SavePicDialog.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/Project$10.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SolitaryPointsAdmin.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SwingWorker.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/OneParameter.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/ConfigFrame$5.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SaveMovie.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/ProgressFrame.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/surfex$3.class
sage-2.10.1.rc3/spkg/standard/singular-3-0-4-1-20071209.p3/src/Singular/LIB/surfex/SavePicDialog$3.class