BUG: Remove old CI for new GitHub Actions

GitHub Actions has already been added, thus travis, circleci, appveyor,
and azurepipelines ci testing must be deprecated. Also, README.rst had
it's azurepipelines badge removed.

Author: mseng10

.circleci/config.yml

@@ -3,10 +3,6 @@ ITKMinimalPathExtraction
 
 .. image:: https://github.com/InsightSoftwareConsortium/ITKMinimalPathExtraction/workflows/Build,%20test,%20package/badge.svg
 
-.. image::  https://dev.azure.com/InsightSoftwareConsortium/ITKModules/_apis/build/status/InsightSoftwareConsortium.ITKMinimalPathExtraction?branchName=master
-    :target: https://dev.azure.com/InsightSoftwareConsortium/ITKModules/_build/latest?definitionId=16&branchName=master
-    :alt: Build Status
-
 
 Overview
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