Remove references to unused cache thing.

app/Helpers/Collector/JournalCollector.php

@@ -37,6 +37,7 @@ use FireflyIII\Models\Category;
 use FireflyIII\Models\Tag;
 use FireflyIII\Models\Transaction;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Support\CacheProperties;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 use Illuminate\Database\Query\JoinClause;
@@ -243,6 +244,18 @@ class JournalCollector implements JournalCollectorInterface
     public function getJournals(): Collection
     {
         $this->run = true;
+
+        // find query set in cache.
+        $hash  = hash('sha256', $this->query->toSql());
+        $key   = 'query-' . substr($hash, -8);
+        $cache = new CacheProperties;
+        $cache->addProperty($key);
+        if ($cache->has()) {
+            Log::debug(sprintf('Return cache of query with ID "%s".', $key));
+
+            return $cache->get(); // @codeCoverageIgnore
+        }
+
         /** @var Collection $set */
         $set = $this->query->get(array_values($this->fields));
 
@@ -263,6 +276,8 @@ class JournalCollector implements JournalCollectorInterface
                 $transaction->opposing_account_iban = app('steam')->tryDecrypt($transaction->opposing_account_iban);
             }
         );
+        Log::debug(sprintf('Cached query with ID "%s".', $key));
+        $cache->store($set);
 
         return $set;
     }
@@ -284,6 +299,14 @@ class JournalCollector implements JournalCollectorInterface
         return $journals;
     }
 
+    /**
+     * @return EloquentBuilder
+     */
+    public function getQuery(): EloquentBuilder
+    {
+        return $this->query;
+    }
+
     /**
      * @param string $filter
      *

app/Helpers/Collector/JournalCollectorInterface.php

@@ -27,6 +27,7 @@ use FireflyIII\Models\Budget;
 use FireflyIII\Models\Category;
 use FireflyIII\Models\Tag;
 use FireflyIII\User;
+use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 use Illuminate\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Collection;
 
@@ -78,6 +79,8 @@ interface JournalCollectorInterface
      */
     public function getPaginatedJournals(): LengthAwarePaginator;
 
+    public function getQuery(): EloquentBuilder;
+
     /**
      * @param string $filter
      *