Remove unused constructor

Change-Id: Iba835038025017cfd16ae31a426e9f007a731063
diff --git a/src/ast_path.cpp b/src/ast_path.cpp
index b913d0c..0079962 100644
--- a/src/ast_path.cpp
+++ b/src/ast_path.cpp
@@ -31,8 +31,6 @@
     return this->m_name == b.m_name && this->m_value == b.m_value;
 }
 
-leafList_::leafList_() = default;
-
 leafList_::leafList_(const std::string& name)
     : m_name(name)
 {
diff --git a/src/ast_path.hpp b/src/ast_path.hpp
index 9138946..da99a26 100644
--- a/src/ast_path.hpp
+++ b/src/ast_path.hpp
@@ -48,7 +48,6 @@
 };
 
 struct leafList_ {
-    leafList_();
     leafList_(const std::string& name);
 
     bool operator==(const leafList_& b) const;