Remove the old DartVM now that 1.20.1 is installed

Change-Id: I9b09a72431a56de8a07fc97e8794ec1103aec77c
diff --git a/google_dart_vm-1f4a0e3ad3c94f9852a53cb59f0e96be511e4f4a.tar.gz b/google_dart_vm-1f4a0e3ad3c94f9852a53cb59f0e96be511e4f4a.tar.gz
deleted file mode 100644
index b9fff61..0000000
--- a/google_dart_vm-1f4a0e3ad3c94f9852a53cb59f0e96be511e4f4a.tar.gz
+++ /dev/null
Binary files differ