remove unused (?) fields.

lua/luasnip/extras/_treesitter.lua

@@ -239,8 +239,6 @@ local builtin_tsnode_selectors = {
 ---@class LuaSnip.extra.TSParser
 ---@field parser LanguageTree
 ---@field source string|number
----@field ori_buf number
----@field buf_lang string
 local TSParser = {}
 
 ---@param bufnr number?
@@ -249,28 +247,21 @@ local TSParser = {}
 ---@return LuaSnip.extra.TSParser?
 function TSParser.new(bufnr, parser, source)
 	bufnr = bufnr or vim.api.nvim_get_current_buf()
-	local buf_lang = get_lang(bufnr)
-	if buf_lang == nil then
-		return
-	end
 
 	local o = {
 		parser = parser,
 		source = source,
-		ori_buf = bufnr,
-		buf_lang = buf_lang,
 	}
 
 	setmetatable(o, {
 		__index = TSParser,
 		---@param self LuaSnip.extra.TSParser
 		---@return string
 		__tostring = function(self)
-			return ("trees: %d, source: %s, lang: %s"):format(
+			return ("trees: %d, source: %s"):format(
 				#self.parser:trees(),
 				type(self.source) == "number" and tostring(self.source)
-					or "[COPYED]",
-				buf_lang
+					or "[COPIED]"
 			)
 		end,
 	})