Remove text builds of documentation (#738)

This PR removes text builds of the documentation, which we do not currently use for anything. Contributes to rapidsai/build-planning#71.

Authors:
  - Vyas Ramasubramani (https://github.com/vyasr)

Approvers:
  - Jake Awe (https://github.com/AyodeAwe)

URL: #738

ci/build_docs.sh

@@ -31,10 +31,8 @@ export RAPIDS_DOCS_DIR="$(mktemp -d)"
 rapids-logger "Build Python docs"
 pushd docs
 sphinx-build -b dirhtml ./source _html
-sphinx-build -b text ./source _text
-mkdir -p "${RAPIDS_DOCS_DIR}/cucim/"{html,txt}
+mkdir -p "${RAPIDS_DOCS_DIR}/cucim/"html
 mv _html/* "${RAPIDS_DOCS_DIR}/cucim/html"
-mv _text/* "${RAPIDS_DOCS_DIR}/cucim/txt"
 popd
 
 rapids-upload-docs