Remove fop from brew dep.s

This'll most likely not be required in the future,
from the way building the docs changes, and I don't
think it makes CI fail otherwise, since it
was there mostly to prevent a warning

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
             /bin/bash -c "$(curl -fsSL \
               https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
             HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=yes \
-              brew install automake fop wxwidgets fish shellcheck shfmt coreutils
+              brew install automake wxwidgets fish shellcheck shfmt coreutils
           else
             sudo sed -i 's/azure\.//' /etc/apt/sources.list # Reduces chance of time-outs
             sudo apt-get update -y