It's already initialized in header class

messagecomposer/src/recipient/recipientspicker.cpp

@@ -45,7 +45,6 @@ using namespace MessageComposer;
 
 RecipientsPicker::RecipientsPicker(QWidget *parent)
     : QDialog(parent)
-    , mLdapSearchDialog(nullptr)
 {
     setObjectName(QStringLiteral("RecipientsPicker"));
     setWindowTitle(i18n("Select Recipient"));