Remove another gnc_pop_locale().

libgnucash/backend/dbi/gnc-dbisqlresult.cpp

@@ -147,7 +147,6 @@ GncDbiSqlResult::IteratorImpl::get_string_at_col(const char* col) const
     auto strval = dbi_result_get_string(m_inst->m_dbi_result, col);
     if (strval == nullptr)
     {
-        gnc_pop_locale (LC_NUMERIC);
         throw (std::invalid_argument{"Column empty."});
     }
     auto retval =  std::string{strval};