remove useless eviction policy usage

libs/common/src/cache.rs

@@ -168,7 +168,7 @@ pub struct CloudflareKVConfig {
   pub namespace_identifier: String,
 }
 
-/// Configuration for In-Memory caching.
+/// Configuration for In-Memory caching, it internally works using an LRU (Least Recently Used) eviction policy
 #[derive(Deserialize, Serialize, Debug, Clone, JsonSchema)]
 pub struct InMemoryConfig {
   /// The maximum number of cache entries. Default is 1000 entries.
@@ -177,11 +177,6 @@ pub struct InMemoryConfig {
   #[serde(default = "in_memory_default_max_size")]
   pub max_size: Option<usize>,
 
-  /// Eviction policy for the cache. Default is LRU (Least Recently Used).
-  /// LRU evicts the least recently accessed items first.
-  #[serde(default = "in_memory_default_eviction_policy")]
-  pub eviction_policy: Option<EvictionPolicy>,
-
   /// Time-to-live for cache entries in seconds. Default is 600 seconds (10 minutes).
   /// This is the duration after which a cache entry will be automatically removed.
   #[serde(default = "in_memory_default_cache_ttl_seconds")]
@@ -192,19 +187,7 @@ pub struct InMemoryConfig {
 fn in_memory_default_max_size() -> Option<usize> {
   Some(1000)
 }
-fn in_memory_default_eviction_policy() -> Option<EvictionPolicy> {
-  Some(EvictionPolicy::LRU)
-}
+
 fn in_memory_default_cache_ttl_seconds() -> Option<u64> {
   Some(600)
 }
-
-/// Eviction policies available for the In-Memory cache.
-#[derive(Deserialize, Serialize, Debug, Clone, JsonSchema, PartialEq)]
-#[serde(rename_all = "lowercase")]
-pub enum EvictionPolicy {
-  /// Least Recently Used: Evicts the least recently accessed items first.
-  LRU,
-  /// First In, First Out: Evicts the oldest items in the cache first.
-  FIFO,
-}