[inspector_protocol] remove old style domains support

lib/ErrorSupport_h.template

Index: lib/ErrorSupport_h.template
diff --git a/lib/ErrorSupport_h.template b/lib/ErrorSupport_h.template
index 9d2a19260305e631ce25ac40cddcccec7bee2811..0c98e3e0ebcd00474c192674351509973577d985 100644
--- a/lib/ErrorSupport_h.template
+++ b/lib/ErrorSupport_h.template
@@ -14,7 +14,6 @@ namespace {{namespace}} {
 class {{config.lib.export_macro}} ErrorSupport {
 public:
     ErrorSupport();
-    ErrorSupport(String* errorString);
     ~ErrorSupport();
 
     void push();
@@ -27,7 +26,6 @@ public:
 private:
     std::vector<String> m_path;
     std::vector<String> m_errors;
-    String* m_errorString;
 };
 
 {% for namespace in config.protocol.namespace %}