Fix post remove script to remove telegraf related

Fix for telegraf issue: influxdata#1379

scripts/post-remove.sh

@@ -43,4 +43,18 @@ elif [[ -f /etc/debian_version ]]; then
 	    disable_update_rcd
 	fi
     fi
+elif [[ -f /etc/os-release ]]; then
+    source /etc/os-release
+    if [[ $ID = "amzn" ]]; then
+	# Amazon Linux logic
+	which systemctl &>/dev/null
+	if [[ $? -eq 0 ]]; then
+	    # I don't find systemd supported in Amazon Linux yet, but adding as Amazon support telegraf is ready to handle systemd
+	    disable_systemd
+	    rm -f /etc/default/telegraf
+	else
+	    # Assuming sysv
+	    disable_chkconfig
+	fi
+    fi
 fi