chore(install-agent): formatting + rm unused variable

supplemental/scripts/install-agent.sh

@@ -1,6 +1,5 @@
 #!/bin/sh
 
-# Move is_alpine function to the top of the file
 is_alpine() {
   [ -f /etc/alpine-release ]
 }
@@ -9,7 +8,6 @@ is_openwrt() {
   cat /etc/os-release | grep -q "OpenWrt"
 }
 
-version=0.0.1
 # Define default values
 PORT=45876
 UNINSTALL=false