[fenix] Don't pass CrashReporter to RustLog

RustLog is no longer using the crash reporter, since crash reports now
go through the `rusterrors` module.

app/src/main/java/org/mozilla/fenix/FenixApplication.kt

@@ -475,11 +475,7 @@ open class FenixApplication : LocaleAwareApplication(), Provider {
         initializeRustErrors(components.analytics.crashReporter)
         // ... but RustHttpConfig.setClient() and RustLog.enable() can be called later.
 
-        // Once application-services has switched to using the new
-        // error reporting system, RustLog shouldn't input a CrashReporter
-        // anymore.
-        // (https://github.com/mozilla/application-services/issues/4981).
-        RustLog.enable(components.analytics.crashReporter)
+        RustLog.enable()
     }
 
     @OptIn(DelicateCoroutinesApi::class) // GlobalScope usage