GN: Remove "outputs" parameter for java_cpp_enum()

ui/touch_selection/BUILD.gn

Index: ui/touch_selection/BUILD.gn
diff --git a/ui/touch_selection/BUILD.gn b/ui/touch_selection/BUILD.gn
index b8d8d40c3a9ea0cdee1304daccfd82496becc0df..a16675dfe79a45a5846d02a0b5a465f4dea5a118 100644
--- a/ui/touch_selection/BUILD.gn
+++ b/ui/touch_selection/BUILD.gn
@@ -105,16 +105,10 @@ if (is_android) {
     sources = [
       "selection_event_type.h",
     ]
-    outputs = [
-      "org/chromium/ui/touch_selection/SelectionEventType.java",
-    ]
   }
   java_cpp_enum("ui_touch_handle_orientation_srcjar") {
     sources = [
       "touch_handle_orientation.h",
     ]
-    outputs = [
-      "org/chromium/ui/touch_selection/TouchHandleOrientation.java",
-    ]
   }
 }