Adapt to AE2 slot rendering refactor

src/main/java/com/glodblock/github/client/gui/GuiFluidInterface.java

@@ -51,13 +51,6 @@ public class GuiFluidInterface extends GuiSub {
         }
     }
 
-    @Override
-    public void func_146977_a(final Slot s) {
-        try {
-            GuiContainer.class.getDeclaredMethod("func_146977_a_original", Slot.class).invoke(this, s);
-        } catch (final Exception ignore) {}
-    }
-
     @Override
     public void drawFG(int offsetX, int offsetY, int mouseX, int mouseY) {
         fontRendererObj.drawString(getGuiDisplayName(I18n.format(NameConst.GUI_FLUID_INTERFACE)), 8, 6, 0x404040);