Get rid of useless variant in get

Change-Id: I2a6c9f46a541c703ceaa02515a8fb6785cb169d2
diff --git a/src/ast_commands.hpp b/src/ast_commands.hpp
index 5ce1cbd..5759eda 100644
--- a/src/ast_commands.hpp
+++ b/src/ast_commands.hpp
@@ -141,7 +141,7 @@
         /> get
         /> get /module:path)";
     bool operator==(const get_& b) const;
-    boost::optional<boost::variant<boost::variant<dataPath_, schemaPath_>, module_>> m_path;
+    boost::optional<boost::variant<dataPath_, schemaPath_, module_>> m_path;
 };
 
 struct describe_ : x3::position_tagged {