remove json report files (#14529)

We don't use this anymore

.github/workflows/test.yml

@@ -72,13 +72,13 b' jobs:'
       run: |
         python -m pip install --only-binary ':all:' --upgrade pip setuptools wheel build
         python -m pip install --only-binary ':all:' --no-binary curio --upgrade -e .[${{ matrix.deps }}]
-        python -m pip install --only-binary ':all:' --upgrade check-manifest pytest-cov  pytest-json-report 'pytest<8'
+        python -m pip install --only-binary ':all:' --upgrade check-manifest pytest-cov  'pytest<8'
     - name: Install and update Python dependencies (dev?)
       if: ${{ contains( matrix.python-version, 'dev' ) }}
       run: |
         python -m pip install --pre --upgrade pip setuptools wheel build
         python -m pip install --pre --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --no-binary curio --upgrade -e .[${{ matrix.deps }}]
-        python -m pip install --pre --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --upgrade check-manifest pytest-cov  pytest-json-report
+        python -m pip install --pre --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --upgrade check-manifest pytest-cov
     - name: Try building with Python build
       if: runner.os != 'Windows'  # setup.py does not support sdist on Windows
       run: |
@@ -101,13 +101,7 b' jobs:'
       env:
         COLUMNS: 120
       run: |
-        pytest --color=yes -raXxs ${{ startsWith(matrix.python-version, 'pypy') && ' ' || '--cov --cov-report=xml' }} --json-report --json-report-file=./report-${{ matrix.python-version }}-${{runner.os}}.json --maxfail=15
-    - uses: actions/upload-artifact@v3
-      with:
-          name: upload pytest timing reports as json
-          path: |
-            ./report-*.json
-
+        pytest --color=yes -raXxs ${{ startsWith(matrix.python-version, 'pypy') && ' ' || '--cov --cov-report=xml' }} --maxfail=15
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4
       with: