fix: no devhub on display

Author: mshanemc

command-snapshot.json

@@ -2,7 +2,7 @@
   {
     "command": "force:org:display",
     "plugin": "@salesforce/plugin-org",
-    "flags": ["apiversion", "json", "loglevel", "targetdevhubusername", "targetusername", "verbose"]
+    "flags": ["apiversion", "json", "loglevel", "targetusername", "verbose"]
   },
   {
     "command": "force:org:list",

src/commands/force/org/display.ts

@@ -21,7 +21,6 @@ export class OrgDisplayCommand extends SfdxCommand {
   public static readonly description = messages.getMessage('description');
   public static readonly examples = messages.getMessage('examples').split(os.EOL);
   public static readonly requiresUsername = true;
-  public static readonly supportsDevhubUsername = true; // required to check scratch orgs for scratchiness
   public static readonly flagsConfig: FlagsConfig = {
     verbose: flags.builtin(),
   };