doc: sync cn and en contribution doc with server CONTRIBUTION.md (#279)

* modify ASF and remove meaningless CLA

---------

Co-authored-by: imbajin <[email protected]>

content/cn/docs/contribution-guidelines/contribute.md

@@ -14,6 +14,8 @@ The following is a contribution guide for HugeGraph:
 
 ## 1. Preparation
 
+**建议**: 使用 [GitHub desktop](https://desktop.github.com/) 可以大幅简化和改善你提交 PR/Commit 的过程, 特别适合新人
+
 We can contribute by reporting issues, submitting code patches or any other feedback.
 
 Before submitting the code, we need to do some preparation:
@@ -41,9 +43,7 @@ Before submitting the code, we need to do some preparation:
    git config user.name "{full-name}" # like "Jermy Li"
    git config user.email "{email-address-of-github}" # like "[email protected]"
    ```
-
-Optional: You can use [GitHub desktop](https://desktop.github.com/) to greatly simplify the commit and update process.
-
+
 ## 2. Create an Issue on GitHub
 
 If you encounter bugs or have any questions, please go to [GitHub Issues](https://github.com/apache/incubator-hugegraph/issues) to report them and feel free to [create an issue](https://github.com/apache/hugegraph/issues/new).
@@ -129,10 +129,6 @@ Note that since GitHub requires submitting code through `username + token` (inst
 
 Go to the web page of GitHub fork repo, there would be a chance to create a Pull Request after pushing to a new branch, just click button "Compare & pull request" to do it. Then edit the description for proposed changes, which can just be copied from the commit message.
 
-Please sign the HugeGraph CLA when contributing code for the first time. You can sign the CLA by just posting a Pull Request Comment same as the below format:
-
-`I have read the CLA Document and I hereby sign the CLA`
-
 Note: please make sure the email address you used to submit the code is bound to the GitHub account. For how to bind the email address, please refer to https://github.com/settings/emails:
 <img width="1280" alt="image" src="https://user-images.githubusercontent.com/9625821/163522445-2a50a72a-dea2-434f-9868-3a0d40d0d037.png">
 

content/en/docs/contribution-guidelines/contribute.md

@@ -12,6 +12,8 @@ The following is a contribution guide for HugeGraph:
 
 ## 1. Preparation
 
+Optional: You can use [GitHub desktop](https://desktop.github.com/) to greatly simplify the commit and update process.
+
 We can contribute by reporting issues, submitting code patches or any other feedback.
 
 Before submitting the code, we need to do some preparation:
@@ -40,8 +42,6 @@ Before submitting the code, we need to do some preparation:
    git config user.email "{email-address-of-github}" # like "[email protected]"
    ```
 
-Optional: You can use [GitHub desktop](https://desktop.github.com/) to greatly simplify the commit and update process.
-
 ## 2. Create an Issue on GitHub
 
 If you encounter bugs or have any questions, please go to [GitHub Issues](https://github.com/apache/incubator-hugegraph/issues) to report them and feel free to [create an issue](https://github.com/apache/hugegraph/issues/new).
@@ -126,10 +126,6 @@ Note that since GitHub requires submitting code through `username + token` (inst
 
 Go to the web page of GitHub fork repo, there would be a chance to create a Pull Request after pushing to a new branch, just click button "Compare & pull request" to do it. Then edit the description for proposed changes, which can just be copied from the commit message.
 
-Please sign the HugeGraph CLA when contributing code for the first time. You can sign the CLA by just posting a Pull Request Comment same as the below format:
-
-`I have read the CLA Document and I hereby sign the CLA`
-
 Note: please make sure the email address you used to submit the code is bound to the GitHub account. For how to bind the email address, please refer to https://github.com/settings/emails:
 <img width="1280" alt="image" src="https://user-images.githubusercontent.com/9625821/163522445-2a50a72a-dea2-434f-9868-3a0d40d0d037.png">