remove pihole group during uninstall

Signed-off-by: pvogt09 <50047961+pvogt09@users.noreply.github.com>

automated install/basic-install.sh

@@ -1771,7 +1771,7 @@ create_pihole_user() {
     # If the user pihole exists,
     if id -u pihole &> /dev/null; then
         # if group exists
-        if getent group pihole; then
+        if getent group pihole > /dev/null 2>&1; then
             # just show a success
             printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
         else
@@ -1799,7 +1799,7 @@ create_pihole_user() {
         local str="Creating user 'pihole'"
         printf "%b  %b %s..." "${OVER}" "${INFO}" "${str}"
         # create her with the useradd command
-        if getent group pihole; then
+        if getent group pihole > /dev/null 2>&1; then
             # add primary group pihole as it already exists
             if useradd -r --no-user-group -g pihole -s /usr/sbin/nologin pihole; then
                 printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"

automated install/uninstall.sh

@@ -188,6 +188,14 @@ removeNoPurge() {
             echo -e "  ${CROSS} Unable to remove 'pihole' user"
         fi
     fi
+    # If the pihole group exists, then remove
+    if getent group "pihole" &> /dev/null; then
+        if ${SUDO} groupdel pihole 2> /dev/null; then
+            echo -e "  ${TICK} Removed 'pihole' group"
+        else
+            echo -e "  ${CROSS} Unable to remove 'pihole' group"
+        fi
+    fi
 
     echo -e "\\n   We're sorry to see you go, but thanks for checking out Pi-hole!
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