Fixed circleci config and lint issues

Signed-off-by: Marco Pracucci <[email protected]>

Author: pracucci

.circleci/config.yml

@@ -141,7 +141,7 @@ jobs:
         command: |
           export CORTEX_IMAGE_PREFIX="${IMAGE_PREFIX:-quay.io/cortexproject/}"
           export CORTEX_IMAGE="${CORTEX_IMAGE_PREFIX}cortex:${CIRCLE_TAG:-$(./tools/image-tag)}"
-          export CORTEX_CHECKOUT_DIR="~/.go_workspace/src/github.com/cortexproject/cortex"
+          export CORTEX_CHECKOUT_DIR="/home/circleci/.go_workspace/src/github.com/cortexproject/cortex"
           echo "Running integration tests with image: $CORTEX_IMAGE"
           go test -timeout 300s -v -count=1 ./integration
 

integration/util.go

@@ -17,7 +17,6 @@ var (
 	mergeFlags      = e2e.MergeFlags
 	newDynamoClient = e2edb.NewDynamoClient
 	generateSeries  = e2e.GenerateSeries
-	buildArgs       = e2e.BuildArgs
 )
 
 func getCortexProjectDir() string {