Removing pypandoc/pandoc requirement

- Was not working well on manylinux2010 build image
- Not necessary, can use markdown directly now

.github/workflows/manylinux2010.yml

@@ -17,7 +17,7 @@ jobs:
     # capnproto build requires cmake 3+, CentOS 6 (manylinux2010) defaults to cmake 2.8
     - name: Install dependencies
       run: |
-        yum install -y cmake3 ninja-build pandoc
+        yum install -y cmake3 ninja-build
         ln -sf /usr/bin/cmake3 /usr/local/bin/cmake
         ln -s /usr/bin/ninja-build /usr/local/bin/ninja
         /opt/python/${{ matrix.python-version }}/bin/python -m pip install -r requirements.txt

.github/workflows/packagingtest.yml

@@ -17,7 +17,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - uses: r-lib/actions/setup-pandoc@v1
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with: