fixed installation command (#5614)

Author: cglucks

content/en/docs/collector/installation.md

@@ -113,7 +113,7 @@ To get started on Debian systems run the following commands:
 
 ```sh
 sudo apt-get update
-sudo apt-get -y install wget systemctl
+sudo apt-get -y install wget
 wget https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v{{% param vers %}}/otelcol_{{% param vers %}}_linux_amd64.deb
 sudo dpkg -i otelcol_{{% param vers %}}_linux_amd64.deb
 ```
@@ -122,7 +122,7 @@ sudo dpkg -i otelcol_{{% param vers %}}_linux_amd64.deb
 
 ```sh
 sudo apt-get update
-sudo apt-get -y install wget systemctl
+sudo apt-get -y install wget
 wget https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v{{% param vers %}}/otelcol_{{% param vers %}}_linux_arm64.deb
 sudo dpkg -i otelcol_{{% param vers %}}_linux_arm64.deb
 ```
@@ -131,7 +131,7 @@ sudo dpkg -i otelcol_{{% param vers %}}_linux_arm64.deb
 
 ```sh
 sudo apt-get update
-sudo apt-get -y install wget systemctl
+sudo apt-get -y install wget
 wget https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v{{% param vers %}}/otelcol_{{% param vers %}}_linux_386.deb
 sudo dpkg -i otelcol_{{% param vers %}}_linux_386.deb
 ```