Bug 1794367 - [devtools] Remove backward compatibility code for 105 r=jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D158937

devtools/client/framework/components/ToolboxToolbar.js

@@ -529,9 +529,7 @@ class ToolboxToolbar extends Component {
       : null;
 
     // Display the toolbar in the MBT and about:debugging MBT if we have server support for it.
-    // @backward-compat { version 105 } supportsSwitchingMode check can be removed when 105 is on release
     const chromeDebugToolbar =
-      toolbox.commands.client.mainRoot.traits.supportsSwitchingMode &&
       toolbox.commands.targetCommand.descriptorFront
         .isBrowserProcessDescriptor &&
       Services.prefs.getBoolPref("devtools.browsertoolbox.fission", false)

devtools/client/shared/components/object-inspector/utils/node.js

@@ -286,13 +286,10 @@ function nodeHasEntries(item) {
     className === "WeakSet" ||
     className === "Storage" ||
     className === "URLSearchParams" ||
-    // @backward-compat { version 105 } Support for enumerate Headers entries was
-    // added in 105. When connecting to older server, we don't want to show the <entries>
-    // node for them. The extra check can be removed once 105 hits release.
-    (className === "Headers" && Array.isArray(value.preview?.entries)) ||
+    className === "Headers" ||
     // @backward-compat { version 106 } Support for enumerate FormData entries was
-    // added in 105. When connecting to older server, we don't want to show the <entries>
-    // node for them. The extra check can be removed once 105 hits release.
+    // added in 106. When connecting to older server, we don't want to show the <entries>
+    // node for them. The extra check can be removed once 106 hits release.
     (className === "FormData" && Array.isArray(value.preview?.entries))
   );
 }

devtools/server/actors/root.js

@@ -129,8 +129,6 @@ exports.RootActor = protocol.ActorClassWithSpec(rootSpec, {
     this.traits = {
       networkMonitor: true,
       resources: supportedResources,
-      // @backward-compat { version 105 } isSwitchingMode not supported by old servers
-      supportsSwitchingMode: true,
       // @backward-compat { version 84 } Expose the pref value to the client.
       // Services.prefs is undefined in xpcshell tests.
       workerConsoleApiMessagesDispatchedToMainThread: Services.prefs