check-remote-image-existence.sh: remove double quotation in [[ ]]

Signed-off-by: Norio Nomura <[email protected]>

hack/check-remote-image-existence.sh

@@ -7,7 +7,7 @@ script_dir=$(dirname "$0")
 result=0
 for template in $(realpath "${script_dir}"/../examples/*.yaml "${script_dir}"/./test-templates/*.yaml|sort -u); do
 	for location in $(yq eval '.images[].location' "${template}"); do
-		if [[ "${location}" == http* ]]; then
+		if [[ ${location} == http* ]]; then
 			response=$(curl -L -s -I -o /dev/null -w "%{http_code}" "${location}")
 			if [[ ${response} != "200" ]]; then
 				line=$(grep -n "${location}" "${template}" | cut -d ':' -f 1)