Remove rake task uniquness workaround

Author: kateinoigakukun

lib/ruby_wasm/rake_task.rb

@@ -62,8 +62,6 @@ def initialize(
       )
     yield self if block_given?
 
-    @products_to_define&.each(&:define_task)
-
     @crossruby.with_libyaml @libyaml
     @crossruby.with_zlib @zlib
     @crossruby.with_wasi_vfs @wasi_vfs
@@ -96,15 +94,4 @@ def hexdigest
     digest << @wasi_vfs.name
     digest.hexdigest
   end
-
-  private
-
-  def add_product(product)
-    @@products ||= {}
-    return @@products[product.name] if @@products[product.name]
-    @@products[product.name] = product
-    @products_to_define ||= []
-    @products_to_define << product
-    product
-  end
 end