fix flutter with nvim 0.12.2

lua/plugins/lsp.lua

@@ -45,8 +45,10 @@ return {
 					})
 				end
 				-- Activate the server
+				if server_name ~= "dartls" then
 					vim.lsp.enable(server_name)
 				end
+			end
 
 			-- Diagnostic display config
 			vim.diagnostic.config({