Dedup NANPA numbers

Remove redundant call to shouldCollapseWith() and remove ignored return value
in collapseWith().

Bug:7519057
Change-Id: I7e01746749d8574dbb596b2e1b09673bf78fa045
diff --git a/src/com/android/dialer/interactions/PhoneNumberInteraction.java b/src/com/android/dialer/interactions/PhoneNumberInteraction.java
index cb19a18..365da26 100644
--- a/src/com/android/dialer/interactions/PhoneNumberInteraction.java
+++ b/src/com/android/dialer/interactions/PhoneNumberInteraction.java
@@ -115,12 +115,8 @@
         }
 
         @Override
-        public boolean collapseWith(PhoneItem phoneItem) {
-            if (!shouldCollapseWith(phoneItem)) {
-                return false;
-            }
+        public void collapseWith(PhoneItem phoneItem) {
             // Just keep the number and id we already have.
-            return true;
         }
 
         @Override