Remove Google SDK instructions. (#28165)

* Remove Google SDK instructions.

Ref: https://github.com/kubernetes/website/issues/20232

* Remove Google SDK instructions for MacOS

* Remove Google SDK instructions for Windows

* Delete install-kubectl-gcloud.md

content/en/docs/tasks/tools/included/install-kubectl-gcloud.md

@@ -1,21 +0,0 @@
----
-title: "gcloud kubectl install"
-description: "How to install kubectl with gcloud snippet for inclusion in each OS-specific tab."
-headless: true
----
-
-You can install kubectl as part of the Google Cloud SDK.
-
-1. Install the [Google Cloud SDK](https://cloud.google.com/sdk/).
-
-1. Run the `kubectl` installation command:
-
-   ```shell
-   gcloud components install kubectl
-   ```
-
-1. Test to ensure the version you installed is up-to-date:
-
-   ```shell
-   kubectl version --client
-   ```

content/en/docs/tasks/tools/install-kubectl-linux.md

@@ -22,7 +22,6 @@ The following methods exist for installing kubectl on Linux:
 - [Install kubectl binary with curl on Linux](#install-kubectl-binary-with-curl-on-linux)
 - [Install using native package management](#install-using-native-package-management)
 - [Install using other package management](#install-using-other-package-management)
-- [Install on Linux as part of the Google Cloud SDK](#install-on-linux-as-part-of-the-google-cloud-sdk)
 
 ### Install kubectl binary with curl on Linux
 
@@ -168,10 +167,6 @@ kubectl version --client
 
 {{< /tabs >}}
 
-### Install on Linux as part of the Google Cloud SDK
-
-{{< include "included/install-kubectl-gcloud.md" >}}
-
 ## Verify kubectl configuration
 
 {{< include "included/verify-kubectl.md" >}}

content/en/docs/tasks/tools/install-kubectl-macos.md

@@ -22,7 +22,6 @@ The following methods exist for installing kubectl on macOS:
 - [Install kubectl binary with curl on macOS](#install-kubectl-binary-with-curl-on-macos)
 - [Install with Homebrew on macOS](#install-with-homebrew-on-macos)
 - [Install with Macports on macOS](#install-with-macports-on-macos)
-- [Install on macOS as part of the Google Cloud SDK](#install-on-macos-as-part-of-the-google-cloud-sdk)
 
 ### Install kubectl binary with curl on macOS
 
@@ -149,11 +148,6 @@ If you are on macOS and using [Macports](https://macports.org/) package manager,
    kubectl version --client
    ```
 
-
-### Install on macOS as part of the Google Cloud SDK
-
-{{< include "included/install-kubectl-gcloud.md" >}}
-
 ## Verify kubectl configuration
 
 {{< include "included/verify-kubectl.md" >}}

content/en/docs/tasks/tools/install-kubectl-windows.md

@@ -21,7 +21,6 @@ The following methods exist for installing kubectl on Windows:
 
 - [Install kubectl binary with curl on Windows](#install-kubectl-binary-with-curl-on-windows)
 - [Install on Windows using Chocolatey or Scoop](#install-on-windows-using-chocolatey-or-scoop)
-- [Install on Windows as part of the Google Cloud SDK](#install-on-windows-as-part-of-the-google-cloud-sdk)
 
 
 ### Install kubectl binary with curl on Windows
@@ -127,10 +126,6 @@ If you have installed Docker Desktop before, you may need to place your `PATH` e
 Edit the config file with a text editor of your choice, such as Notepad.
 {{< /note >}}
 
-### Install on Windows as part of the Google Cloud SDK
-
-{{< include "included/install-kubectl-gcloud.md" >}}
-
 ## Verify kubectl configuration
 
 {{< include "included/verify-kubectl.md" >}}
@@ -147,4 +142,4 @@ Below are the procedures to set up autocompletion for Zsh, if you are running th
 
 ## {{% heading "whatsnext" %}}
 
-{{< include "included/kubectl-whats-next.md" >}}
+{{< include "included/kubectl-whats-next.md" >}}