Fixed an error when typing "/arl filter" ... the interface options filter panel was removed a long time ago

diff --git a/core.lua b/core.lua
index 854ad71..5ef8bd6 100644
--- a/core.lua
+++ b/core.lua
@@ -1472,8 +1472,6 @@ function addon:ChatCommand(input)
 		end
 	elseif (input == strlower(L["Profile"])) then
 		InterfaceOptionsFrame_OpenToCategory(self.optionsFrame["Profiles"])
-	elseif (input == strlower(_G.FILTER)) then
-		InterfaceOptionsFrame_OpenToCategory(self.optionsFrame["Filters"])
 	elseif (input == strlower(L["Documentation"])) then
 		InterfaceOptionsFrame_OpenToCategory(self.optionsFrame["Documentation"])
 	elseif (input == strlower(L["Scan"])) then