fix: remove xml-related packages from Docker build

When libxml is installed (which it is through installing libxml2-dev),
then pip compiles lxml from source against the system libxml. This has
caused a mismatch between the system libxml available at runtime and the
libxml that lxml was compiled against during the build stage. Without
libxml on the system, pip falls back on pre-built binary wheels, which
have their own version of libxml built in.

Refs: https://taiga.maykinmedia.nl/project/maykin-intranet/issue/1169

Author: pi-sigma

Dockerfile

@@ -12,8 +12,6 @@ RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-reco
     build-essential \
     git \
     libpq-dev \
-    libxml2-dev \
-    libxmlsec1-dev \
     libxmlsec1-openssl \
     libgdk-pixbuf2.0-0 \
     libffi-dev \
@@ -68,7 +66,6 @@ RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-reco
     libgdal32 \
     libgeos-c1v5 \
     libproj25 \
-    libxmlsec1-dev \
     libxmlsec1-openssl \
     libgdk-pixbuf2.0-0 \
     libffi-dev \