Huge compile performance refactor

hecl/lib/Runtime/FileStoreManager.cpp

@@ -8,9 +8,7 @@
 using namespace Windows::Storage;
 #endif
 
-namespace hecl
-{
-namespace Runtime
+namespace hecl::Runtime
 {
 static logvisor::Module Log("FileStoreManager");
 
@@ -53,4 +51,3 @@ FileStoreManager::FileStoreManager(SystemStringView domain)
 }
 
 }
-}