Remove unused demo videos

Change-Id: I3f39f0a56d5b403db3de07b3a72391f93a576f14
diff --git a/videos/bliss-phone-demo.mp4 b/videos/bliss-phone-demo.mp4
deleted file mode 100644
index e4d9944..0000000
--- a/videos/bliss-phone-demo.mp4
+++ /dev/null
Binary files differ
diff --git a/videos/bliss-phone-demo.webm b/videos/bliss-phone-demo.webm
deleted file mode 100644
index a3b60f1..0000000
--- a/videos/bliss-phone-demo.webm
+++ /dev/null
Binary files differ