Revert "👷🏾‍♂️ Use ocrd_fileformat#28 for now"

This reverts commit 43cc303100.

Dockerfile-ocrd_fileformat

@@ -2,7 +2,7 @@ ARG DRONE_COMMIT="latest"
 FROM quratorspk/ocrd-galley-core:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
-# XXX ARG OCRD_FILEFORMAT_VERSION="0.2.0"
+ARG OCRD_FILEFORMAT_VERSION="0.2.0"
 
 
 RUN apt-get update && \
@@ -13,11 +13,8 @@ RUN apt-get update && \
       unzip \
     && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
-# XXX pr
+RUN git clone --depth 1 --branch v${OCRD_FILEFORMAT_VERSION} https://github.com/OCR-D/ocrd_fileformat.git && \
-RUN git clone --depth 1 https://github.com/OCR-D/ocrd_fileformat.git && \
     cd ocrd_fileformat/ && \
-    git fetch origin pull/28/head:pr-28 && \
-    git checkout pr-28 && \
     git submodule update --init && \
     make install-fileformat install PREFIX=/usr/local && \
     cd .. && rm -rf ocrd_fileformat/