[INTERNAL] removed editor type variable from SPath class

The variable was never set and never used anywhere in the logic.

Change-Id: Ic527ae56d1e573c4f12523dfde10c16ea52ecba1
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1555
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>