Remove references to privacy level 4 (no longer functional)

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

advanced/Scripts/webpage.sh

@@ -44,7 +44,7 @@ Options:
   -e, email           Set an administrative contact address for the Block Page
   -h, --help          Show this help dialog
   -i, interface       Specify dnsmasq's interface listening behavior
-  -l, privacylevel    Set privacy level (0 = lowest, 4 = highest)"
+  -l, privacylevel    Set privacy level (0 = lowest, 3 = highest)"
     exit 0
 }
 
@@ -633,8 +633,8 @@ clearAudit()
 }
 
 SetPrivacyLevel() {
-    # Set privacy level. Minimum is 0, maximum is 4
-    if [ "${args[2]}" -ge 0 ] && [ "${args[2]}" -le 4 ]; then
+    # Set privacy level. Minimum is 0, maximum is 3
+    if [ "${args[2]}" -ge 0 ] && [ "${args[2]}" -le 3 ]; then
         changeFTLsetting "PRIVACYLEVEL" "${args[2]}"
         pihole restartdns reload-lists
     fi

advanced/bash-completion/pihole

@@ -56,11 +56,11 @@ _pihole() {
 		;;
 		"privacylevel")
 			if ( [[ "$prev2" == "admin" ]] || [[ "$prev2" == "-a" ]] ); then
-				opts_privacy="0 1 2 3 4"
+				opts_privacy="0 1 2 3"
 				COMPREPLY=( $(compgen -W "${opts_privacy}" -- ${cur}) )
-			else 
+			else
 				return 1
-			fi	
+			fi
 		;;
 		"core"|"admin"|"ftl")
 			if [[ "$prev2" == "checkout" ]]; then