Revert "Add the assisted dialing carrier config."

This reverts commit af7b8c0a67f1f416e9156c375a940a47389ab838.

Reason for revert: we're cutting the feature from P

Change-Id: I1ccc2c36b480f64c3a8b3df7eee73f80b7863722
Bug: 73727182
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 91d5da3..d292db3 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -602,17 +602,12 @@
     /**
      * The boolean indicated by this extra controls whether or not a call is eligible to undergo
      * assisted dialing. This extra is stored under {@link #EXTRA_OUTGOING_CALL_EXTRAS}.
+     * @hide
      */
     public static final String EXTRA_USE_ASSISTED_DIALING =
             "android.telecom.extra.USE_ASSISTED_DIALING";
 
     /**
-     * The bundle indicated by this extra store information related to the assisted dialing action.
-     */
-    public static final String EXTRA_ASSISTED_DIALING_TRANSFORMATION_INFO =
-            "android.telecom.extra.ASSISTED_DIALING_TRANSFORMATION_INFO";
-
-    /**
      * The following 4 constants define how properties such as phone numbers and names are
      * displayed to the user.
      */