GM Likely to Cut Jobs in Europe  DETROIT (Reuters) - General Motors Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GM.N target=/stocks/quickinfo/fullquote"&gt;GM.N&lt;/A&gt;, in the  midst of reassessing its unprofitable European operations, is  not ruling out closing a plant there and is likely to cut some  jobs, a GM spokesman said on Wednesday.