Remove deprecated file.

This file only talks about a patch that no longer exists.

Test: None
Change-Id: I771063800ef51d0a51396b269065f51a0b577cef
diff --git a/README.android b/README.android
deleted file mode 100644
index ef72ffa..0000000
--- a/README.android
+++ /dev/null
@@ -1,2 +0,0 @@
-The patch in patches/env.diff needs to be updated with crate version update to match
-the new crate version.