Remove overloads taking const char* which were not needed, because every their use eventually took a string literal convertible to OUString directly. Many other literals were converted to OUStringLiterals. Change-Id: Ia1e742a8087776cd20bf5094dc415dafd9a8834a Reviewed-on: https://gerrit.libreoffice.org/c/core/+/123155 Tested-by: Mike Kaganski <mike.kaganski@collabora.com> Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>