fix: rm un-used docs

Signed-off-by: zongz <zongzhe1024@163.com>

Author: zong-zhe

docs/user_docs/guides/package-management/4-how-to/10-private_mod_repo.md

@@ -15,7 +15,6 @@ More Details - [Download Private Repository Using Git](https://docs.github.com/e
 ## Private OCI Registry
 
 The KCL package management tool supports saving and sharing KCL packages through private OCI Registries. mainly including two parts.
-关于私有的 OCI Registry, 主要包括两个部分
 
 1. Login to the private OCI Registry using the `kcl registry login` command.
 

versioned_docs/version-0.7/user_docs/guides/package-management/4-how-to/10-private_mod_repo.md

@@ -15,7 +15,6 @@ More Details - [Download Private Repository Using Git](https://docs.github.com/e
 ## Private OCI Registry
 
 The KCL package management tool supports saving and sharing KCL packages through private OCI Registries. mainly including two parts.
-关于私有的 OCI Registry, 主要包括两个部分
 
 1. Login to the private OCI Registry using the `kcl registry login` command.
 

versioned_docs/version-0.8/user_docs/guides/package-management/4-how-to/10-private_mod_repo.md

@@ -15,7 +15,6 @@ More Details - [Download Private Repository Using Git](https://docs.github.com/e
 ## Private OCI Registry
 
 The KCL package management tool supports saving and sharing KCL packages through private OCI Registries. mainly including two parts.
-关于私有的 OCI Registry, 主要包括两个部分
 
 1. Login to the private OCI Registry using the `kcl registry login` command.
 

versioned_docs/version-0.9/user_docs/guides/package-management/4-how-to/10-private_mod_repo.md

@@ -15,7 +15,6 @@ More Details - [Download Private Repository Using Git](https://docs.github.com/e
 ## Private OCI Registry
 
 The KCL package management tool supports saving and sharing KCL packages through private OCI Registries. mainly including two parts.
-关于私有的 OCI Registry, 主要包括两个部分
 
 1. Login to the private OCI Registry using the `kcl registry login` command.