polish scripts and doc when without submodule (#47)

Co-authored-by: Evan <evanljp@outlook.com>
diff --git a/README.md b/README.md
index b1d97b7..d0b94e7 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,6 @@
 ```shell script
 git clone https://github.com/apache/skywalking-satellite
 cd skywalking-satellite
-git submodule init
-git submodule update
 make build
 ```
 If you want to know more details about compiling, please read [the doc](./docs/en/guides/compile/How-to-compile.md).
diff --git a/docs/en/guides/compile/How-to-compile.md b/docs/en/guides/compile/How-to-compile.md
index 5519a4c..1736246 100644
--- a/docs/en/guides/compile/How-to-compile.md
+++ b/docs/en/guides/compile/How-to-compile.md
@@ -8,7 +8,5 @@
 ```shell script
 git clone https://github.com/apache/skywalking-satellite
 cd skywalking-satellite
-git submodule init
-git submodule update
 make build
 ```
\ No newline at end of file
diff --git a/docs/en/guides/contribution/How-to-release.md b/docs/en/guides/contribution/How-to-release.md
index af07674..d8c78f3 100644
--- a/docs/en/guides/contribution/How-to-release.md
+++ b/docs/en/guides/contribution/How-to-release.md
@@ -21,7 +21,7 @@
 
 ```shell
 export VERSION=<the version to release>
-git clone --recurse-submodules git@github.com:apache/skywalking-satellite && cd skywalking-satellite
+git clone git@github.com:apache/skywalking-satellite && cd skywalking-satellite
 git tag -a "$VERSION" -m "Release Apache SkyWalking-Satellite $VERSION"
 git push --tags
 make release
diff --git a/tools/release/create_bin_release.sh b/tools/release/create_bin_release.sh
index d057cce..d216723 100644
--- a/tools/release/create_bin_release.sh
+++ b/tools/release/create_bin_release.sh
@@ -56,9 +56,6 @@
 
 git checkout ${TAG_NAME}
 
-git submodule init
-git submodule update
-
 make build
 
 cd ..
diff --git a/tools/release/create_source_release.sh b/tools/release/create_source_release.sh
index c7975a1..f2a74b2 100644
--- a/tools/release/create_source_release.sh
+++ b/tools/release/create_source_release.sh
@@ -55,9 +55,6 @@
 
 git checkout ${TAG_NAME}
 
-git submodule init
-git submodule update
-
 cd ..