No need to use a shared ptr here

Change-Id: Ia3d2f019689efe990cbbde11e9c27a80fd95ae0a
Reviewed-on: https://gerrit.libreoffice.org/35252Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

xmlsecurity/source/gpg/SecurityEnvironment.cxx

@@ -103,7 +103,7 @@ Sequence< Reference < XCertificate > > SecurityEnvironmentGpg::getPersonalCertif
     if (err)
         throw RuntimeException("The GpgME library failed to initialize for the OpenPGP protocol.");
 
-    std::shared_ptr<GpgME::Context> ctx(GpgME::Context::createForProtocol(GpgME::OpenPGP));
+    GpgME::Context* ctx = GpgME::Context::createForProtocol(GpgME::OpenPGP);
     if (ctx == nullptr)
         throw RuntimeException("The GpgME library failed to initialize for the OpenPGP protocol.");