scripts/build/Dockerfile.rawhide: rm

It is not used, probably was committed by mistake.

Fixes: 2d093a17 ("travis: add a job to test on the fedora rawhide")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

scripts/build/Dockerfile.rawhide

-FROM fedora:rawhide
-
-ARG CC=gcc
-
-RUN dnf install -y git gcc make
-RUN dnf install -y protobuf-devel protobuf-c-devel libaio-devel libcap-devel libnl3-devel libnet-devel
-RUN dnf install -y python ccache libasan findutils tar python-yaml protobuf-python iptables iproute python-ipaddr procps-ng
-
-COPY . /criu
-WORKDIR /criu
-RUN make mrproper && make -j $(nproc)
-
-RUN pip install protobuf
-RUN make -C test/zdtm/static env00