Remove textplate's in-game-only items that can cause false-positive a…

…ccessibility warnings. (#119)

The textplate-*material*-small/large-*symbol* items are useful in-game,
but not in YAFC. The textplate-*material*-small and
textplate-*material*-large items still exist, so plate crafting can be
planned.

(This is copied from ShadowTheAge#192)

YAFC/Data/Mod-fixes/EvenMoreTextPlates.globals.lua

@@ -0,0 +1,7 @@
+local evenmoretextplates = ...;
+
+for _,plate in pairs(evenmoretextplates.new_types) do
+	plate.symbols = {}
+end
+
+return evenmoretextplates;

YAFC/Data/Mod-fixes/textplates.textplates.lua

@@ -0,0 +1,7 @@
+local textplates = ...;
+
+for _,plate in pairs(textplates.types) do
+	plate.symbols = {}
+end
+
+return textplates;