More debug

build/linux/ci-common.sh

@@ -36,7 +36,7 @@ if [[ "$KOKORO_BUILD_ID" ]]; then
     # sudo apt-key adv --keyserver apt.llvm.org --recv-keys 15CF4D18AF4F7421
     sudo apt-add-repository "deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-$CLANG_VERSION main"
     wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-    sudo apt-key list
+    rm /etc/apt/sources.list.d/cuda.list && rm /etc/apt/sources.list.d/nvidia-ml.list
     sudo apt-get update -y
     sudo apt-get --assume-yes --force-yes install clang-$CLANG_VERSION