attn: Remove dbus method wrapper extended support

The attention handler dbus method wrapper function allowed for
specifying an extended function parameter for things like get property.
This is no longer being used and was removed.

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I16ed0af65093cbaa577e4a72dee45e441efff104
diff --git a/attn/attn_dbus.cpp b/attn/attn_dbus.cpp
index c40d146..21fae6f 100644
--- a/attn/attn_dbus.cpp
+++ b/attn/attn_dbus.cpp
@@ -12,8 +12,7 @@
 /** @brief Create a dbus method */
 int dbusMethod(const std::string& i_path, const std::string& i_interface,
                const std::string& i_function,
-               sdbusplus::message::message& o_method,
-               const std::string& i_extended)
+               sdbusplus::message::message& o_method)
 {
     int rc = RC_DBUS_ERROR; // assume error
 
@@ -46,22 +45,10 @@
         {
             auto service = responseFindService.begin()->first;
 
-            // Some methods (e.g. get attribute) take an extended parameter
-            if (i_extended == "")
-            {
-                // return the method
-                o_method = bus.new_method_call(service.c_str(), i_path.c_str(),
-                                               i_interface.c_str(),
-                                               i_function.c_str());
-            }
-            else
-            {
-                // return extended method
-                o_method =
-                    bus.new_method_call(service.c_str(), i_path.c_str(),
-                                        i_extended.c_str(), i_function.c_str());
-            }
-
+            // return the method
+            o_method =
+                bus.new_method_call(service.c_str(), i_path.c_str(),
+                                    i_interface.c_str(), i_function.c_str());
             rc = RC_SUCCESS;
         }
         else