Update Typing in Code to Remove Ignore Annotation

[ericspod]

Is your feature request related to a problem? Please describe.
There are a lot of annotations in the code for disabling type checking by mypy and pytype. Some of these are unavoidable where untyped code is used, but in many places this is due to improper types being used.

Describe the solution you'd like
At some point the codebase should be reviewed to identify where better type checking can be done and remove these annotations.