Remove no longer necessary rand patch

patches/0001-rand-Enable-c2-chacha-simd-feature.patch

@@ -1,23 +0,0 @@
-From 9c5663e36391fa20becf84f3af2e82afa5bb720b Mon Sep 17 00:00:00 2001
-From: bjorn3 <bjorn3@users.noreply.github.com>
-Date: Sat, 15 Aug 2020 19:56:03 +0200
-Subject: [PATCH] [rand] Enable c2-chacha simd feature
-
----
- rand_chacha/Cargo.toml | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/rand_chacha/Cargo.toml b/rand_chacha/Cargo.toml
-index 9190b7f..872cca2 100644
---- a/rand_chacha/Cargo.toml
-+++ b/rand_chacha/Cargo.toml
-@@ -24,5 +24,5 @@ ppv-lite86 = { version = "0.2.8", default-features = false }
- 
- [features]
- default = ["std"]
--std = ["ppv-lite86/std"]
-+std = ["ppv-lite86/std", "ppv-lite86/simd"]
- simd = [] # deprecated
--- 
-2.20.1
-