unopkg: Remove too verbose logging

This adds several lines of 'Extension x not found' when installing
an extension with 'unopkg add'.
Since it's expected that the extension is not yet there when installing it,
remove this logging.

Change-Id: Ifc2ea5fa04253a96fee60016a65505e0d1f2722c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86516
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

desktop/source/deployment/manager/dp_manager.cxx

@@ -1066,8 +1066,7 @@ Reference<deployment::XPackage> PackageManagerImpl::getDeployedPackage(
         const ::osl::MutexGuard guard( getMutex() );
         return getDeployedPackage_( id, fileName, xCmdEnv );
     }
-    catch (const lang::IllegalArgumentException & exc) {
-        logIntern( Any(exc) );
+    catch (const lang::IllegalArgumentException &) {
         throw;
     }
     catch (const RuntimeException &) {