Remove redundant checks in protocol dropdown in edit printer dialog

- It was redundant to disable a network protocol option when the
  dropdown was already disabled if there is no connectivity or
  is a USB printer.

Bug: 947183
Test: End to End manual, browsertests
Change-Id: Iff171ad14a2db8a2911357b3aa5225d6b5ded177
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1748004
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688242}

chrome/browser/resources/settings/printing_page/cups_edit_printer_dialog.html

@@ -59,22 +59,22 @@
                   on-change="onProtocolChange_"
                   disabled="[[!protocolSelectEnabled(isOnline_,
                       networkProtocolActive_)]]">
-                <option value="ipp" disabled="[[!networkProtocolActive_]]">
+                <option value="ipp">
                   $i18n{printerProtocolIpp}
                 </option>
-                <option value="ipps" disabled="[[!networkProtocolActive_]]">
+                <option value="ipps">
                   $i18n{printerProtocolIpps}
                 </option>
-                <option value="http" disabled="[[!networkProtocolActive_]]">
+                <option value="http">
                   $i18n{printerProtocolHttp}
                 </option>
-                <option value="https" disabled="[[!networkProtocolActive_]]">
+                <option value="https">
                   $i18n{printerProtocolHttps}
                 </option>
-                <option value="socket" disabled="[[!networkProtocolActive_]]">
+                <option value="socket">
                   $i18n{printerProtocolAppSocket}
                 </option>
-                <option value="lpd" disabled="[[!networkProtocolActive_]]">
+                <option value="lpd">
                   $i18n{printerProtocolLpd}
                 </option>
                 <option value="usb" disabled="[[networkProtocolActive_]]">