Revert it as in CI we can't build it.

(cherry picked from commit f4a62c48)

CMakeLists.txt

@@ -52,7 +52,10 @@ find_package(KF5Contacts ${KF5_MIN_VERSION} CONFIG REQUIRED)
 
 find_package(KF5Mime ${KMIMELIB_VERSION} CONFIG REQUIRED)
 find_package(KF5Akonadi ${AKONADI_VERSION} CONFIG REQUIRED)
-find_package(KF5Libkleo ${LIBKLEO_LIB_VERSION} CONFIG REQUIRED)
+find_package(KF5Libkleo ${LIBKLEO_LIB_VERSION} CONFIG)
+if (NOT WIN32)
+    set_package_properties(KF5Libkleo PROPERTIES TYPE REQUIRED)
+endif()
 find_package(KF5GrantleeTheme ${GRANTLEETHEME_LIB_VERSION} CONFIG REQUIRED)
 
 find_package(Grantlee5 ${GRANTLEE_LIB_VERSION} CONFIG REQUIRED)

src/akonadi-contacts/CMakeLists.txt

@@ -39,6 +39,9 @@ set(akonadicontact_actions_SRCS
     actions/qekigadialer.cpp
     )
 
+if (TARGET KF5::Libkleo)
+    set(HAVE_KLEO TRUE)
+endif()
 configure_file(config-akonadi-contact.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-akonadi-contact.h)
 
 configure_file( actions/contactactionssettings.kcfg.cmake ${CMAKE_CURRENT_BINARY_DIR}/contactactionssettings.kcfg @ONLY)
@@ -159,10 +162,12 @@ target_link_libraries(KF5AkonadiContact
     Grantlee5::Templates
     )
 
+if(TARGET KF5::Libkleo)
 target_link_libraries(KF5AkonadiContact
     PRIVATE
     KF5::Libkleo
     )
+endif()
 
 set_target_properties(KF5AkonadiContact PROPERTIES
     VERSION ${AKONADICONTACT_VERSION_STRING}

src/akonadi-contacts/config-akonadi-contact.h.cmake

 #define AKONADI_CONTACT_LIB  "${KDE_INSTALL_FULL_LIBDIR}"
+#cmakedefine HAVE_KLEO

src/akonadi-contacts/grantlee/contactgrantleewrapper.cpp

@@ -6,7 +6,9 @@
 
 #include "config-akonadi-contact.h"
 #include "contactgrantleewrapper.h"
+#ifdef HAVE_KLEO
 #include <Libkleo/Enum>
+#endif
 #include <KLocalizedString>
 
 #include <QBuffer>
@@ -76,12 +78,20 @@ int ContactGrantleeWrapper::age() const
 
 QString ContactGrantleeWrapper::cryptoPreference() const
 {
+#ifdef HAVE_KLEO
     return Kleo::encryptionPreferenceToLabel(Kleo::stringToEncryptionPreference(custom(QStringLiteral("KADDRESSBOOK"), QStringLiteral("CRYPTOENCRYPTPREF"))));
+#else
+    return custom(QStringLiteral("KADDRESSBOOK"), QStringLiteral("CRYPTOENCRYPTPREF"));
+#endif
 }
 
 QString ContactGrantleeWrapper::signaturePreference() const
 {
+#ifdef HAVE_KLEO
     return Kleo::signingPreferenceToLabel(Kleo::stringToSigningPreference(custom(QStringLiteral("KADDRESSBOOK"), QStringLiteral("CRYPTOSIGNPREF"))));
+#else
+    return custom(QStringLiteral("KADDRESSBOOK"), QStringLiteral("CRYPTOSIGNPREF"));
+#endif
 }
 
 static QString imgToDataUrl(const QImage &image)