Revert "add fix for full tools and sanitizer"

This reverts commit 6efacfb7a5.

src/doc/rustc/src/platform-support/openharmony.md

@@ -1,6 +1,6 @@
 # `*-unknown-linux-ohos`
 
-**Tier: 2（with Host Tools）**
+**Tier: 2**
 
 * aarch64-unknown-linux-ohos
 * armv7-unknown-linux-ohos
@@ -18,17 +18,6 @@ system.
 - Amanieu d'Antras ([@Amanieu](https://github.com/Amanieu))
 - Lu Binglun ([@lubinglun](https://github.com/lubinglun))
 
-## Requirements
-
-All the ohos targets of Tier 2 with host tools support all extended rust tools.
-(exclude `miri`, the support of `miri` will be added soon)
-
-### Host toolchain
-
-The targets require a reasonably up-to-date OpenHarmony SDK on the host.
-
-The targets support `cargo`, which require [ohos-openssl](https://github.com/ohos-rs/ohos-openssl).
-
 ## Setup
 
 The OpenHarmony SDK doesn't currently support Rust compilation directly, so