Remove calls to getLteOnCdmaModeStatic()

Read the sysprop directly instead. The rest of the
functionality has been removed.

Bug: 138225216
Test: compilation
Change-Id: I3a3fd94200095aeb1228a5c90f1c9d81709b647c
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 1461c55..560f1cc 100755
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -4371,7 +4371,8 @@
             if (phone == null) {
                 return PhoneConstants.LTE_ON_CDMA_UNKNOWN;
             } else {
-                return phone.getLteOnCdmaMode();
+                return TelephonyProperties.lte_on_cdma_device()
+                        .orElse(PhoneConstants.LTE_ON_CDMA_FALSE);
             }
         } finally {
             Binder.restoreCallingIdentity(identity);