refactor start

home/ags/node_modules/semver/internal/lrucache.js

@@ -1,40 +0,0 @@
-class LRUCache {
-  constructor () {
-    this.max = 1000
-    this.map = new Map()
-  }
-
-  get (key) {
-    const value = this.map.get(key)
-    if (value === undefined) {
-      return undefined
-    } else {
-      // Remove the key from the map and add it to the end
-      this.map.delete(key)
-      this.map.set(key, value)
-      return value
-    }
-  }
-
-  delete (key) {
-    return this.map.delete(key)
-  }
-
-  set (key, value) {
-    const deleted = this.delete(key)
-
-    if (!deleted && value !== undefined) {
-      // If cache is full, delete the least recently used item
-      if (this.map.size >= this.max) {
-        const firstKey = this.map.keys().next().value
-        this.delete(firstKey)
-      }
-
-      this.map.set(key, value)
-    }
-
-    return this
-  }
-}
-
-module.exports = LRUCache