Remove some unused methods.

Change-Id: I507118f5239d7539dbce973cdc124f734e60b87b
diff --git a/src/main/java/com/android/tools/r8/graph/AppInfo.java b/src/main/java/com/android/tools/r8/graph/AppInfo.java
index d480e3f..ec98db1 100644
--- a/src/main/java/com/android/tools/r8/graph/AppInfo.java
+++ b/src/main/java/com/android/tools/r8/graph/AppInfo.java
@@ -211,16 +211,6 @@
     }
   }
 
-  public DexProgramClass unsafeDirectProgramTypeLookup(DexType type) {
-    return app.programDefinitionFor(type);
-  }
-
-  public Origin originFor(DexType type) {
-    assert checkIfObsolete();
-    DexClass definition = app.definitionFor(type);
-    return definition == null ? Origin.unknown() : definition.origin;
-  }
-
   /**
    * Lookup static method on the method holder, or answers null.
    *