revert r5932

git-svn-id: https://svn.r-project.org/ESS/trunk@5935 0bbaf3bd-34e0-0310-bf65-c717079852d4
don't place .log in SAS[LST]

git-svn-id: https://svn.r-project.org/ESS/trunk@5936 0bbaf3bd-34e0-0310-bf65-c717079852d4