remove clear()

src/storage/storageResolver.js

@@ -6,7 +6,7 @@ var util = require('../helpers/global')
 class StorageResolver {
   constructor (_traceManager) {
     this.traceManager = _traceManager
-    this.clear()
+    this.storageByAddress = {}
   }
 
   /**
@@ -49,14 +49,6 @@ class StorageResolver {
   }
 
   /**
-    * clear the cache
-    *
-    */
-  clear () {
-    this.storageByAddress = {}
-  }
-
-  /**
     * resolve the storage to the specified execution step @arg index. uses the traceManager.accumulateStorageChanges
     *
     * @param {Int} index  - execution step index