Change libcurl workaround to be less precise

Dockerfile.in

@@ -57,15 +57,11 @@ RUN apt-get -y install --no-install-recommends \
         ca-certificates \
         coreutils \
         socat \
-        openssh-client
+        openssh-client \
+        git
 # We want a newer git than the norm.
 RUN apt-get -y -t buster-backports install --no-install-recommends \
         git
-# libcurl3-gnutls=7.74.0-1.2~bpo10+1 is broken.  We can downgrade for now until
-# the fix reaches upstream.
-# https://github.com/kubernetes/git-sync/issues/395
-RUN apt-get -y install --no-install-recommends --allow-downgrades \
-        libcurl3-gnutls:amd64=7.64.0-4+deb10u2
 RUN apt-get -y autoremove
 RUN rm -rf /var/lib/apt/lists/*