diff --git a/Libraries/LibLine/Editor.cpp b/Libraries/LibLine/Editor.cpp
index dde601ad22..3e2854c7a6 100644
--- a/Libraries/LibLine/Editor.cpp
+++ b/Libraries/LibLine/Editor.cpp
@@ -118,14 +118,6 @@ void Editor::stylize(const Span& span, const Style& style)
     m_spans_ending.set(span.end(), ending_map);
 }
 
-void Editor::cut_mismatching_chars(String& completion, const String& other, size_t start_compare)
-{
-    size_t i = start_compare;
-    while (i < completion.length() && i < other.length() && completion[i] == other[i])
-        ++i;
-    completion = completion.substring(0, i);
-}
-
 String Editor::get_line(const String& prompt)
 {
     set_prompt(prompt);
diff --git a/Libraries/LibLine/Editor.h b/Libraries/LibLine/Editor.h
index a5817c83dc..4faed1febb 100644
--- a/Libraries/LibLine/Editor.h
+++ b/Libraries/LibLine/Editor.h
@@ -105,7 +105,6 @@ public:
     void clear_line();
     void insert(const String&);
     void insert(const char);
-    void cut_mismatching_chars(String& completion, const String& other, size_t start_compare);
     void stylize(const Span&, const Style&);
     void strip_styles()
     {