Remove obsolete context key (microsoft#252887)

Author: roblourens

src/vs/workbench/contrib/chat/browser/chatSetup.ts

@@ -99,7 +99,6 @@ const defaultChat = {
 
 const ToolsAgentContextKey = ContextKeyExpr.and(
 	ContextKeyExpr.equals(`config.${ChatConfiguration.AgentEnabled}`, true),
-	ChatContextKeys.Editing.agentModeDisallowed.negate(),
 	ContextKeyExpr.not(`previewFeaturesDisabled`) // Set by extension
 );
 

src/vs/workbench/contrib/chat/common/chatContextKeys.ts

@@ -79,7 +79,6 @@ export namespace ChatContextKeys {
 	export const completionsQuotaExceeded = new RawContextKey<boolean>('completionsQuotaExceeded', false, true);
 
 	export const Editing = {
-		agentModeDisallowed: new RawContextKey<boolean>('chatAgentModeDisallowed', undefined, { type: 'boolean', description: localize('chatAgentModeDisallowed', "True when agent mode is not allowed.") }), // experiment-driven disablement
 		hasToolConfirmation: new RawContextKey<boolean>('chatHasToolConfirmation', false, { type: 'boolean', description: localize('chatEditingHasToolConfirmation', "True when a tool confirmation is present.") }),
 	};