Remove even more headers

src/Cache.cpp

@@ -31,6 +31,7 @@
 
 #include "Cache.h"
 #include "Cache_p.h"
+#include "Logging.h"
 #include "Utils.h"
 
 //! Should be changed when a breaking change occurs in the cache format.

src/Cache_p.h

@@ -18,7 +18,6 @@
 
 #pragma once
 
-#include <mutex>
 #include <optional>
 
 #include <QDateTime>
@@ -38,8 +37,6 @@
 
 #include "CacheCryptoStructs.h"
 #include "CacheStructs.h"
-#include "Logging.h"
-#include "MatrixClient.h"
 
 int
 numeric_key_comparison(const MDB_val *a, const MDB_val *b);