Remove weave support from update_engine.

This codepath is not used anymore.

Bug: None
Test: `make checkbuild`.
Change-Id: I0f7f22d63cb2c3fbfabcda25763160e2470ef2c5
diff --git a/daemon.h b/daemon.h
index 5910783..c10bb28 100644
--- a/daemon.h
+++ b/daemon.h
@@ -20,9 +20,9 @@
 #include <memory>
 #include <string>
 
-#if USE_WEAVE || USE_BINDER
+#if USE_BINDER
 #include <brillo/binder_watcher.h>
-#endif  // USE_WEAVE || USE_BINDER
+#endif  // USE_BINDER
 #include <brillo/daemons/daemon.h>
 
 #if USE_BINDER
@@ -63,9 +63,9 @@
   // the main() function.
   Subprocess subprocess_;
 
-#if USE_WEAVE || USE_BINDER
+#if USE_BINDER
   brillo::BinderWatcher binder_watcher_;
-#endif  // USE_WEAVE || USE_BINDER
+#endif  // USE_BINDER
 
 #if USE_BINDER
 #if USE_OMAHA