Use Aer from release for 3.9 test jobs

.github/workflows/main.yml

@@ -31,10 +31,6 @@ jobs:
         run: python -m pip install -U tox setuptools virtualenv wheel
       - name: Install and Run Tests
         run: tox -e py
-        if: matrix.python-version != '3.9'
-      - name: Install and Run Tests
-        run: tox -e py39
-        if: matrix.python-version == '3.9'
 
   tests-macos:
     name: tests-python${{ matrix.python-version }}-${{ matrix.os }}
@@ -62,10 +58,6 @@ jobs:
         run: python -m pip install -U tox setuptools virtualenv wheel cvxopt
       - name: Install and Run Tests
         run: tox --sitepackages -e py
-        if: matrix.python-version != '3.9'
-      - name: Install and Run Tests
-        run: tox --sitepackages -e py39
-        if: matrix.python-version == '3.9'
 
   tests-no-opt:
     name: tests-python3.8-no-optional-dependencies
@@ -98,8 +90,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        # TODO: Add 3.9 to the list after aer 0.8.0 release
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
       - uses: actions/checkout@v2
       - name: Add msbuild to PATH

requirements-dev.txt

@@ -1,6 +1,6 @@
 pylint==2.4.4
 pycodestyle
-qiskit-aer>=0.3.0;python_version<'3.9'
+qiskit-aer>=0.3.0
 scikit-learn>=0.17
 Sphinx>=2.1
 sphinx-rtd-theme>=0.4.0

tox.ini

@@ -20,15 +20,6 @@ commands =
     pip install -c constraints.txt cvxpy<1.1.8
     pip check
     stestr run {posargs}
-# Remove after qiskit-aer 0.8.0 release:
-[testenv:py39]
-commands =
-    pip install -U -c constraints.txt git+https://github.com/Qiskit/qiskit-terra.git
-    pip install -U -c constraints.txt git+https://github.com/Qiskit/qiskit-aer.git
-    pip install -U -c constraints.txt -r{toxinidir}/requirements-dev.txt
-    pip install -c constraints.txt cvxpy<1.1.8
-    pip check
-    stestr run {posargs}
 
 [testenv:no-opt]
 deps =