Remove Pandoc need

Author: ojacques

.github/workflows/build-pdf.yml

@@ -19,8 +19,6 @@ jobs:
       - name: Install Ubuntu dependencies
         run: |
           sudo snap install chromium
-          sudo apt-get -q update
-          sudo apt-get -qq -y install pandoc texlive-xetex
       - uses: actions/cache@v2
         with:
           path: ~/.npm