diff --git a/training/stringrenderer.cpp b/training/stringrenderer.cpp
index a4f1994b4d..43c3d7efae 100644
--- a/training/stringrenderer.cpp
+++ b/training/stringrenderer.cpp
@@ -140,14 +140,6 @@ void StringRenderer::set_resolution(const int resolution) {
   font_.set_resolution(resolution);
 }
 
-void StringRenderer::set_underline_start_prob(const double frac) {
-  underline_start_prob_ = min(max(frac, 0.0), 1.0);
-}
-
-void StringRenderer::set_underline_continuation_prob(const double frac) {
-  underline_continuation_prob_ = min(max(frac, 0.0), 1.0);
-}
-
 StringRenderer::~StringRenderer() {
   ClearBoxes();
   FreePangoCairo();