diff --git a/lib/spoom/sorbet/config.rb b/lib/spoom/sorbet/config.rb
index 14b15ce5..6d021ca1 100644
--- a/lib/spoom/sorbet/config.rb
+++ b/lib/spoom/sorbet/config.rb
@@ -40,14 +40,6 @@ def initialize
         @no_stdlib = false #: bool
       end
 
-      #: (Config source) -> void
-      def initialize_copy(source)
-        super
-        @paths = @paths.dup
-        @ignore = @ignore.dup
-        @allowed_extensions = @allowed_extensions.dup
-      end
-
       # Returns self as a string of options that can be passed to Sorbet
       #
       # Example: