algo: remove unused variable

alib2algo/src/arbology/exact/BoyerMooreHorspool.h

@@ -70,7 +70,6 @@ template < class SymbolType >
 ext::set < unsigned > BoyerMooreHorspool::match ( const tree::PrefixRankedBarTree < SymbolType > & subject, const tree::PrefixRankedBarNonlinearPattern < SymbolType > & pattern ) {
 	ext::set < unsigned > occ;
 	ext::map < common::ranked_symbol < SymbolType >, size_t > bcs = tree::properties::BadCharacterShiftTable::bcs ( pattern ); //NOTE: the subjects alphabet must be a subset or equal to the pattern
-	ext::map < common::ranked_symbol < SymbolType >, unsigned > variablesSetting;
 	ext::vector < int > subjectSubtreeJumpTable = tree::properties::SubtreeJumpTable::compute ( subject );
 	tree::PrefixRankedBarTree < unsigned > repeats = tree::properties::ExactSubtreeRepeatsNaive::repeats ( subject );