fix(workflow): remove duplicate tests

.github/workflows/develop.yml

@@ -3,7 +3,6 @@ name: darts develop workflow
 on:
   push:
     branches-ignore:
-      - master
       - develop
 
 jobs:
@@ -71,4 +70,3 @@ jobs:
       - name: "6. Build docs"
         run: |
           ./gradlew buildDocs
-

.github/workflows/merge.yml

@@ -10,10 +10,9 @@ on:
 
 jobs:
   tests:
-    runs-on: ${{ matrix.os }}
+    runs-on: macos-latest
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest]
         python-version: [3.6, 3.7, 3.8]
 
     steps:
@@ -59,36 +58,3 @@ jobs:
       - name: "3. Run examples ${{matrix.example-name}}"
         run: |
           ./gradlew checkExample -PexampleName=${{matrix.example-name}}
-
-  docs:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "1. Clone repository"
-        uses: actions/checkout@v2
-
-      - name: "2. Set up Python 3.6"
-        uses: actions/setup-python@v1
-        with:
-          python-version: 3.6
-
-      - name: "3. Install pandoc"
-        run: |
-          sudo apt-get install -y pandoc
-
-      - name: "4. Setup pip"
-        run: |
-          ./gradlew setupPip
-
-      - name: "5. Attach cache for pip"
-        uses: actions/cache@v1
-        id: cache
-        with:
-          path: ~/.cache/pip
-          key: release-${{ runner.os }}-pip-${{ hashFiles('requirements/main.txt', 'requirements/release.txt') }}
-          restore-keys: |
-            release-${{ runner.os }}-pip-
-
-      - name: "6. Build docs"
-        run: |
-          ./gradlew buildDocs