Remove first argument of Schema::isModule

The argument wasn't used anywhere, I have no idea why it was there.

Change-Id: I21b9c3fa323187e5f0484d4db9e2c543f9a6f7cf
diff --git a/src/yang_schema.hpp b/src/yang_schema.hpp
index 14b0f1e..27452de 100644
--- a/src/yang_schema.hpp
+++ b/src/yang_schema.hpp
@@ -31,7 +31,7 @@
 
     bool isContainer(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool isLeaf(const schemaPath_& location, const ModuleNodePair& node) const override;
-    bool isModule(const schemaPath_& location, const std::string& name) const override;
+    bool isModule(const std::string& name) const override;
     bool isList(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool isPresenceContainer(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool leafEnumHasValue(const schemaPath_& location, const ModuleNodePair& node, const std::string& value) const override;