removed bogus methods from docs (leftovers from when the functionality was in a different place than it currently is (I think))

closes PR 11999

collects/scribblings/tools/unit.scrbl

@@ -794,31 +794,12 @@ the calls cannot be nested).
 This method returns the language-settings that will be used
 when the user next clicks Run in this DrRacket window.
 
-}
-
-@defmethod[(get-port-name-identifier)
-           symbol]{
-
-Returns an identifier that can be used as a port's name when
-the editor is not saved. (If it is saved, the filename of
-the editor should be used.)
-
-
 }
 
 @defmethod[(get-tab)
            (is-a?/c drracket:unit:tab%)]{
 Returns the editor's enclosing tab.
 
-}
-
-@defmethod[(port-name-matches? [id any])
-           boolean?]{
-
-Indicates if the name of a port (which is also saved in the
-source field of an exception record) matches this editor.
-
-
 }
 
 @defmethod[(set-needs-execution-message [msg string?])