Use explicit unique targets for hifi4 operators

Differential Revision: D93517711

Pull Request resolved: #17525

Author: mcremon-meta

backends/cadence/hifi/operators/BUCK

@@ -1,13 +1,5 @@
-load("@fbcode_macros//build_defs:build_file_migration.bzl", "fbcode_target", "non_fbcode_target")
 load("targets.bzl", "define_common_targets")
 
 oncall("odai_jarvis")
 
-non_fbcode_target(_kind = define_common_targets,)
-
-# !!!! fbcode/executorch/backends/cadence/hifi/operators/TARGETS was merged into this file, see https://fburl.com/workplace/xl8l9yuo for more info !!!!
-
-load("targets.bzl", "define_common_targets")
-
-
-fbcode_target(_kind = define_common_targets,)
+define_common_targets()