Merge pull request vitessio#3277 from michael-berlin/remove_code

Remove unused Exponential Weighted Moving Averge Library and Estimator.

First alpha release of Vitess 2.1

Vitess v2.0.0 RTM

Release Candidate 2

v2.0.0 Release Candidate 1

Vitess v2.0.0-beta.2

Vitess 2.0 alpha 5

Vitess v2.0.0-alpha4

v2 alpha 3