lineage: Remove external/koush/ion

* It was used in VoicePlus and some cyngn apps,
  but now it's unused, so kill it

Change-Id: I7236f22987c1d65f2f4286cf4ef4411fd70f0998
diff --git a/snippets/lineage.xml b/snippets/lineage.xml
index 267f631..86270db 100644
--- a/snippets/lineage.xml
+++ b/snippets/lineage.xml
@@ -9,7 +9,6 @@
   <!--<project path="external/ffmpeg" name="LineageOS/android_external_ffmpeg" />-->
   <project path="external/fuse" name="LineageOS/android_external_fuse" />
   <project path="external/htop" name="LineageOS/android_external_htop" />
-  <!--<project path="external/koush/ion" name="LineageOS/ion" />-->
   <project path="external/libncurses" name="LineageOS/android_external_libncurses" />
   <project path="external/libnfc-nxp" name="LineageOS/android_external_libnfc-nxp" />
   <project path="external/libtar" name="LineageOS/android_external_libtar" />