Use env_logger instead of simplelog in tests

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

gpui/src/test.rs

@@ -1,8 +1,6 @@
 use ctor::ctor;
-use simplelog::SimpleLogger;
-use log::LevelFilter;
 
 #[ctor]
 fn init_logger() {
-    SimpleLogger::init(LevelFilter::Info, Default::default()).expect("could not initialize logger");
+    env_logger::init();
 }