The code browser is in my opinion one of the most useful features of github. Commit history and blame combined with the "unnecessary noise" you describes makes it very easy for me to find out the last time I touched some line or file and what changed.
Why do you really care about the file size and amount of files btw?
A lot of files in C# (and I'd imagine Java) just contain interfaces because it's so 'cheap' to make these in IDEs and that's the programming style.
So often you're looking for the files which contain the majority of the code and you're just having to open random files trying to find it. How big the file is shows roughly how many LOC it contains.
This is actually becoming more common in javascript as well as more people unbundle their code, it'd be useful seeing if the file you're about to open is meat or chaff.
I'm fine with showing the last commit time, that is useful information, the comment itself though is invariably noise to everyone but the committer or team.
Why do you really care about the file size and amount of files btw?