test-fileset: forget non-portable files to avoid failures on Windows

The 3 deleted lines appeared on Windows, because the files were never created in
the first place.

tests/test-fileset.t

@@ -247,6 +247,9 b' Test with a revision'
   bar 
   baz\
   con.xml
+  $ hg forget 'bar '
+  $ hg forget 'baz\'
+  $ hg forget 'con.xml'
 #endif
 
   $ fileset -r4 'subrepo("re:su.*")'
@@ -271,10 +274,7 b' Test with a revision'
   a1
   b1
   b2
-  bar 
-  baz\
   c1
-  con.xml
   mixed
   $ fileset 'eol(mac)'
   mac