remove redundant code

Author: smnwttbr

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPathEditor.cs

@@ -67,17 +67,6 @@ public void SetExpectedControlLayout(string expectedControlLayout)
             m_PickerDropdown?.SetExpectedControlLayout(m_ExpectedControlLayout);
         }
 
-        public void SetExpectedControlLayoutFromAttribute()
-        {
-            var field = pathProperty.GetField();
-            if (field == null)
-                return;
-
-            var attribute = field.GetCustomAttribute<InputControlAttribute>();
-            if (attribute != null)
-                SetExpectedControlLayout(attribute.layout);
-        }
-
         public void OnGUI()
         {
             EditorGUILayout.BeginHorizontal();
@@ -177,13 +166,6 @@ private void ShowDropdown(Rect rect, SerializedProperty serializedProperty, Acti
                     });
             }
 
-            m_PickerDropdown.SetPickedCallback(path =>
-            {
-                serializedProperty.stringValue = path;
-                m_PickerState.manualPathEditMode = false;
-                modifiedCallback();
-            });
-
             m_PickerDropdown.SetControlPathsToMatch(m_ControlPathsToMatch);
             m_PickerDropdown.SetExpectedControlLayout(m_ExpectedControlLayout);
 

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPickerDropdown.cs

@@ -58,11 +58,6 @@ public void SetExpectedControlLayout(string expectedControlLayout)
             Reload();
         }
 
-        public void SetPickedCallback(Action<string> action)
-        {
-            m_OnPickCallback = action;
-        }
-
         protected override void OnDestroy()
         {
             #if UNITY_INPUT_SYSTEM_PROJECT_WIDE_ACTIONS