bpo-43888: Remove coverage builds from CI (GH-25679)

The coverage builds were consistently timing out in CI, suggesting that people were not reviewing the uploaded reports.

.travis.yml

@@ -69,61 +69,6 @@ matrix:
         - make -C Doc/ PYTHON=../python venv
       script:
         xvfb-run make -C Doc/ PYTHON=../python SPHINXOPTS="-q -W -j4" doctest
-    - name: "Test code coverage (Python)"
-      os: linux
-      language: c
-      compiler: gcc
-      env: OPTIONAL=true
-      addons:
-        apt:
-          packages:
-            - xvfb
-      before_script:
-        - |
-            if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]
-            then
-              echo "Don't run Python coverage on pull requests."
-              exit
-            fi
-        - ./configure
-        - make -j4
-        # Need a venv that can parse covered code.
-        - ./python -m venv venv
-        - ./venv/bin/python -m pip install -U coverage
-        - ./venv/bin/python -m pip install -r Misc/requirements-test.txt
-        - ./venv/bin/python -m test.pythoninfo
-        - export PYTHONPATH=`find venv -name fullcoverage`
-      script:
-        # Skip tests that re-run the entire test suite.
-        - xvfb-run ./venv/bin/python -m coverage run --branch --pylib -m test --fail-env-changed -uall,-cpu -x test_multiprocessing_fork -x test_multiprocessing_forkserver -x test_multiprocessing_spawn -x test_concurrent_futures || true
-      after_script:  # Probably should be after_success once test suite updated to run under coverage.py.
-        # Make the `coverage` command available to Codecov w/ a version of Python that can parse all source files.
-        - export PYTHONPATH=
-        - source ./venv/bin/activate
-        - bash <(curl -s https://codecov.io/bash) -y .github/codecov.yml
-    - name: "Test code coverage (C)"
-      os: linux
-      language: c
-      compiler: gcc
-      env: OPTIONAL=true
-      addons:
-        apt:
-          packages:
-            - lcov
-            - xvfb
-      before_script:
-        - |
-            if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]
-            then
-              echo "Don't run C coverage on pull requests."
-              exit
-            fi
-        - ./configure
-      script:
-        - xvfb-run make -j4 coverage-report
-      after_script:  # Probably should be after_success once test suite updated to run under coverage.py.
-        - make pythoninfo
-        - bash <(curl -s https://codecov.io/bash) -y .github/codecov.yml
 
 
 before_install:

README.rst

@@ -13,10 +13,6 @@ This is Python version 3.10.0 alpha 7
    :alt: CPython build status on Azure DevOps
    :target: https://dev.azure.com/python/cpython/_build/latest?definitionId=4&branchName=master
 
-.. image:: https://codecov.io/gh/python/cpython/branch/master/graph/badge.svg
-   :alt: CPython code coverage on Codecov
-   :target: https://codecov.io/gh/python/cpython
-
 .. image:: https://img.shields.io/badge/discourse-join_chat-brightgreen.svg
    :alt: Python Discourse chat
    :target: https://discuss.python.org/