anagram: rm duplicate cases
anagram: rm duplicate cases

the mass/last case was duplicated exactly, while the tapper/patter case
was tested once with tapper as subject and once with patter as subject
(I arbitrarily chose to keep the one appearing earlier in the file)

jmluy/x-common,Vankog/problem-specifications,jmluy/x-common,exercism/x-common,kgengler/x-common,petertseng/x-common,Vankog/problem-specifications,kgengler/x-common,ErikSchierboom/x-common,petertseng/x-common,jmluy/x-common,rpottsoh/x-common,ErikSchierboom/x-common,rpottsoh/x-common,exercism/x-common