Revert "Avoid error if xargs is empty"

This reverts commit b2fb8d3.

deploy.sh

@@ -201,19 +201,19 @@ echo
 echo "Changing directory to SVN and committing to trunk."
 cd $SVNPATH/trunk/
 # Delete all files that should not now be added.
-svn status | grep -v "^.[ \t]*\..*" | grep "^\!" | awk '{print $2"@"}' | xargs -r svn del
+svn status | grep -v "^.[ \t]*\..*" | grep "^\!" | awk '{print $2"@"}' | xargs svn del
 # Add all new files that are not set to be ignored
-svn status | grep -v "^.[ \t]*\..*" | grep "^?" | awk '{print $2"@"}' | xargs -r svn add
+svn status | grep -v "^.[ \t]*\..*" | grep "^?" | awk '{print $2"@"}' | xargs svn add
 svn commit --username=$SVNUSER -m "Preparing for $PLUGINVERSION release"
 
 echo
 
 echo "Updating WordPress plugin repo assets and committing."
 cd $SVNPATH/assets/
 # Delete all new files that are not set to be ignored
-svn status | grep -v "^.[ \t]*\..*" | grep "^\!" | awk '{print $2"@"}' | xargs -r svn del
+svn status | grep -v "^.[ \t]*\..*" | grep "^\!" | awk '{print $2"@"}' | xargs svn del
 # Add all new files that are not set to be ignored
-svn status | grep -v "^.[ \t]*\..*" | grep "^?" | awk '{print $2"@"}' | xargs -r svn add
+svn status | grep -v "^.[ \t]*\..*" | grep "^?" | awk '{print $2"@"}' | xargs svn add
 svn update --quiet --accept working $SVNPATH/assets/*
 svn commit --username=$SVNUSER -m "Updating assets"