Remove unused import.

Reported by errorprone.

R=yroussel

Change-Id: I39a636e6c7d0e7b71c90744179c9aa1053d48a74
diff --git a/src/main/java/com/android/tools/r8/origin/Origin.java b/src/main/java/com/android/tools/r8/origin/Origin.java
index 79efa54..9e3d33e 100644
--- a/src/main/java/com/android/tools/r8/origin/Origin.java
+++ b/src/main/java/com/android/tools/r8/origin/Origin.java
@@ -4,7 +4,6 @@
 
 package com.android.tools.r8.origin;
 
-import com.android.tools.r8.Resource;
 import java.util.ArrayList;
 import java.util.List;