Remove the email function (#4870)

- **What does this PR aim to accomplish?:**

We offered to set an administrator email which was shown on the blockpage. With the removal of the blockpage (#3910) this function is not needed anymore.

Corresponding web interface PR: pi-hole/web#2301

advanced/Scripts/webpage.sh

@@ -46,7 +46,6 @@ Options:
   -c, celsius                     Set Celsius as preferred temperature unit
   -f, fahrenheit                  Set Fahrenheit as preferred temperature unit
   -k, kelvin                      Set Kelvin as preferred temperature unit
-  -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, 3 = highest)
@@ -568,37 +567,6 @@ RemoveDHCPStaticAddress() {
 
 }
 
-SetAdminEmail() {
-    if [[ "${1}" == "-h" ]] || [[ "${1}" == "--help" ]]; then
-        echo "Usage: pihole -a email <address>
-Example: 'pihole -a email admin@address.com'
-Set an administrative contact address for the Block Page
-
-Options:
-  \"\"                  Empty: Remove admin contact
-  -h, --help          Show this help dialog"
-        exit 0
-    fi
-
-    if [[ -n "${args[2]}" ]]; then
-
-        # Sanitize email address in case of security issues
-        # Regex from https://stackoverflow.com/a/2138832/4065967
-        local regex
-        regex="^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\$"
-        if [[ ! "${args[2]}" =~ ${regex} ]]; then
-            echo -e "  ${CROSS} Invalid email address"
-            exit 0
-        fi
-
-        addOrEditKeyValPair "${setupVars}" "ADMIN_EMAIL" "${args[2]}"
-        echo -e "  ${TICK} Setting admin contact to ${args[2]}"
-    else
-        addOrEditKeyValPair "${setupVars}" "ADMIN_EMAIL" ""
-        echo -e "  ${TICK} Removing admin contact"
-    fi
-}
-
 SetListeningMode() {
     source "${setupVars}"
 
@@ -847,7 +815,6 @@ main() {
         "-h" | "--help"       ) helpFunc;;
         "addstaticdhcp"       ) AddDHCPStaticAddress;;
         "removestaticdhcp"    ) RemoveDHCPStaticAddress;;
-        "-e" | "email"        ) SetAdminEmail "$3";;
         "-i" | "interface"    ) SetListeningMode "$@";;
         "-t" | "teleporter"   ) Teleporter;;
         "adlist"              ) CustomizeAdLists;;

advanced/bash-completion/pihole

@@ -15,7 +15,7 @@ _pihole() {
 			COMPREPLY=( $(compgen -W "${opts_lists}" -- ${cur}) )
 		;;
 		"admin")
-			opts_admin="celsius email fahrenheit interface kelvin password privacylevel"
+			opts_admin="celsius fahrenheit interface kelvin password privacylevel"
 			COMPREPLY=( $(compgen -W "${opts_admin}" -- ${cur}) )
 		;;
 		"checkout")

advanced/index.php

@@ -34,7 +34,7 @@
     // When directly browsing via IP or authorized hostname
     // Render splash/landing page based off presence of $landPage file
     // Unset variables so as to not be included in $landPage or $splashPage
-    unset($svPasswd, $svEmail, $authorizedHosts, $validExtTypes, $currentUrlExt);
+    unset($authorizedHosts);
     // If $landPage file is present
     if (is_file(getcwd()."/$landPage")) {
         unset($serverName, $viewPort); // unset extra variables not to be included in $landpage

manpages/pihole.8

@@ -11,8 +11,6 @@ Pi-hole : A black-hole for internet advertisements
 .br
 \fBpihole -a\fR (\fB-c|-f|-k\fR)
 .br
-\fBpihole -a -e\fR email
-.br
 \fBpihole -a -i\fR interface
 .br
 \fBpihole -a -l\fR privacylevel
@@ -132,9 +130,6 @@ Available commands and options:
       -f, fahrenheit    Set Fahrenheit as preferred temperature unit
 .br
       -k, kelvin        Set Kelvin as preferred temperature unit
-.br
-      -e, email         Set an administrative contact address for the
-                        Block Page
 .br
       -i, interface     Specify dnsmasq's interface listening behavior
 .br