fix: fix failing tests

Author: mtk3d

src/Prometheus/Storage/RedisClients/PHPRedis.php

@@ -66,17 +66,6 @@ public function getOption(string $option): mixed
         return $this->redis->getOption(self::OPTIONS_MAP[$option]);
     }
 
-    public function stripKeyPrefix(string $key): string
-    {
-        /** @var mixed $prefix */
-        $prefix = $this->redis->getOption(\Redis::OPT_PREFIX);
-        if (!is_string($prefix) || $prefix === '') {
-            return $key;
-        }
-
-        return substr($key, strlen($prefix));
-    }
-
     public function eval(string $script, array $args = [], int $num_keys = 0): void
     {
         $this->redis->eval($script, $args, $num_keys);

src/Prometheus/Storage/RedisClients/Predis.php

@@ -61,11 +61,6 @@ public function getOption(string $option): mixed
         return $this->options[$mappedOption] ?? null;
     }
 
-    public function stripKeyPrefix(string $key): string
-    {
-        return $key;
-    }
-
     private function getClient(): Client
     {
         if ($this->client === null) {

src/Prometheus/Storage/RedisClients/RedisClient.php

@@ -10,8 +10,6 @@ interface RedisClient
 
     public function getOption(string $option): mixed;
 
-    public function stripKeyPrefix(string $key): string;
-
     /**
      * @param  mixed[]  $args
      */