Remove Python 2 CI job (#3727)

The Python 2 and 3 jobs run essentially the same thing twice. I asked for
a sign from implementations if any of them were relying on Python 2 for
their test262 runners, but didn't hear of any that were.

The Python tools are changed so rarely that I think it's OK to drop this
CI job. If a future change breaks Python 2 for someone, we can accept PRs
to fix it on a best-effort basis, or reinstate this CI job if it's really
necessary.

Closes: #3480

Co-authored-by: Richard Gibson <richard.gibson@gmail.com>
Co-authored-by: Ms2ger <Ms2ger@gmail.com>

.circleci/config.yml

@@ -37,9 +37,9 @@ execution_steps: &execution_steps
     - run: hostPath=$HOME/.esvu/bin/$hostPath npm run ci
 
 jobs:
-  "Test262: verify tools; build & lint tests (Python 2)":
+  "Test262: verify tools; build & lint tests":
     docker:
-      - image: cimg/python:2.7
+      - image: cimg/python:3.7.4
     working_directory: ~/test262
     steps:
       - checkout
@@ -64,30 +64,6 @@ jobs:
       # - run:
       #     name: "Run deploy"
       #     command: ./tools/scripts/deploy.sh
-  "Test262: verify tools; build & lint tests (Python 3)":
-    docker:
-      - image: cimg/python:3.7.4
-    working_directory: ~/test262
-    steps:
-      - checkout
-      - run:
-          name: "Install requirements for generation tool"
-          command: python -m pip install --user --requirement tools/generation/requirements.txt
-      - run:
-          name: "Install requirements for lint tool"
-          command: python -m pip install --user --requirement tools/lint/requirements.txt
-      - run:
-          name: "Test the generation tool"
-          command: ./tools/generation/test/run.py
-      - run:
-          name: "Test the lint tool"
-          command: ./tools/lint/test/run.py
-      - run:
-          name: "Build tests; check for new changes"
-          command: ./tools/scripts/ci_build.sh
-      - run:
-          name: "Lint tests"
-          command: ./tools/scripts/ci_lint.sh
   "V8: New or modified tests execution":
     docker:
       - image: *node_latest
@@ -170,8 +146,7 @@ workflows:
   version: 2
   Tools:
     jobs:
-      - "Test262: verify tools; build & lint tests (Python 2)"
-      - "Test262: verify tools; build & lint tests (Python 3)"
+      - "Test262: verify tools; build & lint tests"
   Tests execution:
     jobs:
       - "ChakraCore: New or modified tests execution"