fixed tests

tests/format.cpp

@@ -44,8 +44,6 @@ TEST_CASE("log_levels", "[log_levels]")
 {
     REQUIRE(log_info("Hello", spdlog::level::err) == "");
     REQUIRE(log_info("Hello", spdlog::level::critical) == "");    
-    REQUIRE(log_info("Hello", spdlog::level::emerg) == "");
-    REQUIRE(log_info("Hello", spdlog::level::alert) == "");
     REQUIRE(log_info("Hello", spdlog::level::info) == "Hello");
     REQUIRE(log_info("Hello", spdlog::level::debug) == "Hello");
     REQUIRE(log_info("Hello", spdlog::level::trace) == "Hello");