Remove superfluous rosalind example
Remove superfluous rosalind example

The up to date version is in the categories/rosalind directory

stmuk/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,Quinny/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples