scripts/updatedep: fix shellcheck errors

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

scripts/updatedep.sh

@@ -7,13 +7,9 @@ if ! [[ "$0" =~ scripts/updatedep.sh ]]; then
 fi
 
 if [[ $(go version) != "go version go1.11"* ]]; then
-  echo "expect Go 1.11+, got:" $(go version)
+  echo "expect Go 1.11+, got:" "$(go version)"
   exit 255
 fi
 
-<<COMMENT
-GO111MODULE=on go mod init
-COMMENT
-
 GO111MODULE=on go mod tidy -v
 GO111MODULE=on go mod vendor -v