1 files changed, 0 insertions, 17 deletions
diff --git a/extools/featurize_grammar.cc b/extools/featurize_grammar.cc
index 5c51fffe..2fc53ff9 100644
--- a/extools/featurize_grammar.cc
+++ b/extools/featurize_grammar.cc
@@ -306,22 +306,6 @@ struct RulePenalty : public FeatureExtractor {
   const int fid_;
 };
 
-struct BackoffRule : public FeatureExtractor {
-  BackoffRule() : fid_(FD::Convert("BackoffRule")) {}
-
-  virtual void ExtractFeatures(const WordID lhs,
-                               const vector<WordID>& src,
-                               const vector<WordID>& trg,
-                               const RuleStatistics& /*info*/,
-                               SparseVector<float>* result) const {
-    (void) lhs; (void) src; (void) trg;
-    const string& lhstr = TD::Convert(lhs);
-    if(lhstr.find('_')!=string::npos)
-        result->set_value(fid_, -1);
-  }
-  const int fid_;
-};
-
 // The negative log of the condition rule probs 
 // ignoring the identities of the  non-terminals. 
 // i.e. the prob Hiero would assign.
@@ -702,7 +686,6 @@ int main(int argc, char** argv){
   reg.Register("LexProb", new FEFactory<LexProbExtractor>);
   reg.Register("XFeatures", new FEFactory<XFeatures>);
   reg.Register("LabelledRuleConditionals", new FEFactory<LabelledRuleConditionals>);
-  reg.Register("BackoffRule", new FEFactory<BackoffRule>);
   reg.Register("RulePenalty", new FEFactory<RulePenalty>);
   reg.Register("LHSProb", new FEFactory<LHSProb>);
   reg.Register("LabellingShape", new FEFactory<LabellingShape>);