Remove obsolete bench/ and btl/ directories

libeigen/eigen!2217

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>

setup.cfg

@@ -6,7 +6,6 @@ skip = .git,build,.build,build-clang,*.o,*.a,*.so,*.pyc,blas/f2c,blas/testing,la
 # Variable names: matA/matC/MatA/MatC/matc, ComplexT, bReal, kInf, Indx,
 #   ans, ges, workd, whch, pres, dum, ot/Ot, bu/Bu, fo/Fo, ue/Ue,
 #   ALS, FOM, NIN, lowd (AVX), anc (TensorIntDiv), scond (LAPACK API),
-#   somme (bench/btl variable), copie/frequence (bench/btl French comments)
 # Author name: Manuel Yguel (polynomial modules)
 # Eigen packet op names: padd/padds (packet add), preverse (packet reverse)
 # AltiVec function name: bload (block load)
@@ -19,7 +18,6 @@ ignore-words-list =
     ot,bu,fo,ue,
     als,fom,nin,
     lowd,anc,scond,
-    somme,copie,frequence,
     preverse,halfs,compiletime,
     ded,numer,inpt,overfl,lastr,
     bload,vaccum,