Bug 1719939 - remove browser.proton.enabled from network error page code, r=jaws

Depends on D134308

Differential Revision: https://phabricator.services.mozilla.com/D134309

browser/base/content/certerror/aboutNetError.js

@@ -261,22 +261,6 @@ function initPage() {
   }
 
   var err = gErrorCode;
-  // List of error pages with an illustration.
-  let illustratedErrors = [
-    "malformedURI",
-    "dnsNotFound",
-    "connectionFailure",
-    "netInterrupt",
-    "netTimeout",
-    "netReset",
-    "netOffline",
-  ];
-  if (
-    illustratedErrors.includes(err) &&
-    !RPMGetBoolPref("browser.proton.enabled")
-  ) {
-    document.body.classList.add("illustrated", err);
-  }
   if (err == "blockedByPolicy") {
     document.body.classList.add("blocked");
   }
@@ -924,7 +908,7 @@ function setCertErrorDetails(event) {
         "wrongSystemTime_systemDate1"
       ).textContent = systemDate;
       if (clockSkew) {
-        document.body.classList.add("illustrated", "clockSkewError");
+        document.body.classList.add("clockSkewError");
         document.l10n.setAttributes(titleElement, "clockSkewError-title");
         let clockErrDesc = document.getElementById("ed_clockSkewError");
         desc = document.getElementById("errorShortDescText");
@@ -933,10 +917,6 @@ function setCertErrorDetails(event) {
           // eslint-disable-next-line no-unsanitized/property
           desc.innerHTML = clockErrDesc.innerHTML;
         }
-        let errorPageContainer = document.getElementById("errorPageContainer");
-        let textContainer = document.getElementById("text-container");
-        errorPageContainer.style.backgroundPosition = `left top calc(50vh - ${textContainer.clientHeight /
-          2}px)`;
       } else {
         let targetElems = document.querySelectorAll(
           "#wrongSystemTime_systemDate2"

browser/themes/shared/error-pages.css

@@ -71,20 +71,6 @@ body {
   body {
     padding: 0 12px;
   }
-
-  /* At some point the screen gets so small that the cute
-   * critter image takes up too much valuable screen real
-   * estate to keep it showing. */
-  #errorPageContainer {
-    background-image: none !important;
-  }
-
-  /* When the critter is hidden, also use the full screen
-   * size for the error text */
-  .illustrated #text-container {
-    margin: unset;
-    padding-inline-start: 0;
-  }
 }
 
 @media only screen and (max-height: 480px) {

toolkit/modules/RemotePageAccessManager.jsm

@@ -92,7 +92,6 @@ let RemotePageAccessManager = {
         "security.certerrors.tls.version.show-override",
         "security.xfocsp.errorReporting.automatic",
         "security.xfocsp.errorReporting.enabled",
-        "browser.proton.enabled",
       ],
       RPMSetBoolPref: [
         "security.tls.version.enable-deprecated",