Consider removing the 'powered by' section from tag pages

[0xdevalias]

Or at very least the 'Build' hash, as it seems to generate a lot of churn on every build, and the tag files don't actually exist in the source in the same way as our posts since they're generated.

eg. 48ab2aa#diff-015085cf951f302074bdaa6f2ff967a124ccc0c2940ee5a85288686c03644d54