Various code cleanup.

app/Helpers/Report/NetWorth.php

@@ -63,6 +63,7 @@ class NetWorth implements NetWorthInterface
      * @return array
      * @throws JsonException
      * @throws FireflyException
+     * @deprecated
      */
     public function getNetWorthByCurrency(Collection $accounts, Carbon $date): array
     {

app/Helpers/Report/NetWorthInterface.php

@@ -34,6 +34,8 @@ use Illuminate\Support\Collection;
 interface NetWorthInterface
 {
     /**
+     * TODO unsure why this is deprecated.
+     *
      * Returns the user's net worth in an array with the following layout:
      *
      * -