Inline and remove `DataflowAnalysis::num_bits_overall()`.
Inline and remove `DataflowAnalysis::num_bits_overall()`.

It has a single callsite, and duplicates some code from that callsite.
The code is more concise and clearer this way.

aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust