data frames (model frames) returned binaryChoice( ..., method = "model.frame" ) and model.frame.binaryChoice() now include the weights if they were specified

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/sampleselection@1526 d36ae590-6c38-44c5-9ba5-7217e93607d8
removed 3 commands in the test script for probit models that became obsolete, because data frames (model frames) returned binaryChoice( ..., method = "model.frame" ) and model.frame.binaryChoice() now include the weights if they were specified

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/sampleselection@1527 d36ae590-6c38-44c5-9ba5-7217e93607d8