Temporarily delete cache metric index
It will be added again in the next deploy as:
```
{
"fields":["kind", "http_status", "error_code"],
"unique": True
}
```
(In another PR)
Temporarily delete cache metric index: It will be added again in the next deploy as:
```
{
"fields":["kind", "http_status", "error_code"],
"unique": True
}
```
(In another PR)