am dfff601c: Allow the radio to be specified as a standalone file.

* commit 'dfff601c1549287194781937c74ce5935bf33470':
  Allow the radio to be specified as a standalone file.
diff --git a/clear-factory-images-variables.sh b/clear-factory-images-variables.sh
index aa41e7c..bae0abb 100644
--- a/clear-factory-images-variables.sh
+++ b/clear-factory-images-variables.sh
@@ -25,6 +25,7 @@
 unset ERASE
 unset PRODUCT
 unset RADIO
+unset RADIOFILE
 unset RADIOSRC
 unset RADIOFILE
 unset SLEEPDURATION