Remove extras install from workflows

Author: RaghuSpaceRajan

Diff for: .github/workflows/gh-test.yml

@@ -24,7 +24,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest pytest-cov setuptools numpy
-        pip install -e .[extras]
+        pip install -e .
         pip install ray[rllib,debug]
         pip install tensorflow
     - name: Lint with flake8

Diff for: .github/workflows/install-from-pypi.yml

@@ -25,7 +25,7 @@ jobs:
         pip install numpy
     - name: Install from PyPI
       run: |
-        pip install mdp-playground[extras]
+        pip install mdp-playground
     - name: Basic functionality test
       run: |
         run-mdpp-experiments --help