[ci] Fixes to remove repo.radeon.com build-args

HiP docker images should inherit the repo information from the hcc image,
so no need to duplicate in HiP again


[ROCm/hip commit: ed82afad2e]

projects/hip/docker/dockerfile-build-ubuntu-16.04

@@ -18,7 +18,7 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-ins
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# docker pipeline runs containers with uid 1000
+# docker pipeline runs containers with particular uid
 # create a jenkins user with this specific uid so it can use sudo priviledges
 # Grant any member of sudo group password-less sudo privileges
 RUN useradd --create-home -u ${user_uid} -G sudo --shell /bin/bash jenkins && \

projects/hip/docker/dockerfile-hip-ubuntu-16.04

@@ -1,6 +1,5 @@
 # Parameters related to building hip
 ARG base_image
-ARG REPO_RADEON=$REPO_RADEON
 
 FROM ${base_image}
 MAINTAINER Kent Knox <kent.knox@amd>
@@ -10,8 +9,6 @@ COPY *.deb /tmp/
 
 # Install the debian package
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y curl \
-  && curl -sL http://$REPO_RADEON/rocm/apt/debian/rocm.gpg.key | apt-key add - \
-  && echo deb [arch=amd64] http://$REPO_RADEON/rocm/apt/debian/ xenial main | tee /etc/apt/sources.list.d/rocm.list \
   && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --allow-unauthenticated -y \
     /tmp/hip_base-*.deb \
     /tmp/hip_hcc-*.deb \