diff --git a/Library/Homebrew/sorbet/rbi/dsl/cask/cask.rbi b/Library/Homebrew/sorbet/rbi/dsl/cask/cask.rbi
index 1ea511aa2e..c0aec7da89 100644
--- a/Library/Homebrew/sorbet/rbi/dsl/cask/cask.rbi
+++ b/Library/Homebrew/sorbet/rbi/dsl/cask/cask.rbi
@@ -9,9 +9,6 @@ class Cask::Cask
   sig { params(args: T.untyped, block: T.untyped).returns(T.untyped) }
   def app(*args, &block); end
 
-  sig { params(args: T.untyped, block: T.untyped).returns(T.untyped) }
-  def appcast(*args, &block); end
-
   sig { params(args: T.untyped, block: T.untyped).returns(T.untyped) }
   def appdir(*args, &block); end