Remove duplicated code from README

README.md

@@ -354,7 +354,6 @@ new MaterialDialog.Builder(this)
         .positiveColorRes(R.color.material_red_500)
         .neutralColorRes(R.color.material_red_500)
         .negativeColorRes(R.color.material_red_500)
-        .neutralColorRes(R.color.material_red_500)
         .titleGravity(GravityEnum.CENTER_HORIZONTAL)
         .contentGravity(GravityEnum.CENTER_HORIZONTAL)
         .btnStackedGravity(GravityEnum.START)