Remove redundant prefix from libcockatrice_card folders

Took 28 minutes

libcockatrice_card/libcockatrice/card/database/card_database_manager.cpp

@@ -0,0 +1,12 @@
+#include "card_database_manager.h"
+
+CardDatabase *CardDatabaseManager::getInstance()
+{
+    static CardDatabase instance; // Created only once, on first access
+    return &instance;
+}
+
+CardDatabaseQuerier *CardDatabaseManager::query()
+{
+    return getInstance()->query();
+}