[core] remove unused flags from SQLite header

platform/default/sqlite3.hpp

@@ -14,10 +14,6 @@ enum OpenFlag : int {
     ReadOnly = 0x00000001,
     ReadWrite = 0x00000002,
     Create = 0x00000004,
-    NoMutex = 0x00008000,
-    FullMutex = 0x00010000,
-    SharedCache = 0x00020000,
-    PrivateCache = 0x00040000,
 };
 
 enum class ResultCode : int {

platform/qt/src/sqlite3.cpp

@@ -113,10 +113,6 @@ mapbox::util::variant<Database, Exception> Database::tryOpen(const std::string &
         if (!connectOptions.isEmpty()) connectOptions.append(';');
         connectOptions.append("QSQLITE_OPEN_READONLY");
     }
-    if (flags & OpenFlag::SharedCache) {
-        if (!connectOptions.isEmpty()) connectOptions.append(';');
-        connectOptions.append("QSQLITE_ENABLE_SHARED_CACHE");
-    }
 
     db.setConnectOptions(connectOptions);
     db.setDatabaseName(QString(filename.c_str()));