Delete unused flag

This flag is unused after the previous commit.

Test: TH
Change-Id: Ic6b5378f503b822d5bdf9a94cf328ffef5e3a5b8
diff --git a/common/flags.aconfig b/common/flags.aconfig
index 3496a3f..17ef94b 100644
--- a/common/flags.aconfig
+++ b/common/flags.aconfig
@@ -41,15 +41,6 @@
 }
 
 flag {
-  name: "tethering_request_with_soft_ap_config"
-  is_exported: true
-  namespace: "android_core_networking"
-  description: "The flag controls the access for the parcelable TetheringRequest with getSoftApConfiguration/setSoftApConfiguration API"
-  bug: "216524590"
-  is_fixed_read_only: true
-}
-
-flag {
   name: "tethering_with_soft_ap_config"
   is_exported: true
   namespace: "android_core_networking"