Remove file logging

This hasn't proven to be as useful as i had hoped:
- My arcane logic for determining logging categories is apparently broken
- It won't work with the logging by the new crypto sdk
- I never actually ended up looking at my own logs, or anyone else's
- It seems to cause crashes

src/app/main.cpp

@@ -49,7 +49,6 @@
 #include "blurhashimageprovider.h"
 #include "colorschemer.h"
 #include "controller.h"
-#include "logger.h"
 #include "login.h"
 #include "registration.h"
 #include "roommanager.h"
@@ -182,8 +181,6 @@ int main(int argc, char *argv[])
     KCrash::initialize();
 #endif
 
-    initLogging();
-
     Connection::setEncryptionDefault(true);
     Connection::setDirectChatEncryptionDefault(true);