Merge pull request #23840 from drodriguez/build-script-remove-unused-method

[utils] Remove unused method.
diff --git a/utils/swift_build_support/swift_build_support/products/product.py b/utils/swift_build_support/swift_build_support/products/product.py
index ebf1b39..6fb917f 100644
--- a/utils/swift_build_support/swift_build_support/products/product.py
+++ b/utils/swift_build_support/swift_build_support/products/product.py
@@ -31,11 +31,6 @@
         return cls.product_name()
 
     @classmethod
-    def get_build_directory_name(cls, host_target):
-        return "{}-{}".format(cls.product_name(),
-                              host_target.name)
-
-    @classmethod
     def is_build_script_impl_product(cls):
         """is_build_script_impl_product -> bool