diff --git a/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi b/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi
index b90b857ce7..9275df2ee4 100644
--- a/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi
+++ b/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi
@@ -32,9 +32,6 @@ class Homebrew::Cmd::FetchCmd::Args < Homebrew::CLI::Args
   sig { returns(T::Boolean) }
   def casks?; end
 
-  sig { returns(T.nilable(String)) }
-  def concurrency; end
-
   sig { returns(T::Boolean) }
   def deps?; end