Remove tools/clang (this will break things temporarily).

tools/clang/blink_gc_plugin/tests/own_ptr_to_gc_managed_class.txt

Index: tools/clang/blink_gc_plugin/tests/own_ptr_to_gc_managed_class.txt
diff --git a/tools/clang/blink_gc_plugin/tests/own_ptr_to_gc_managed_class.txt b/tools/clang/blink_gc_plugin/tests/own_ptr_to_gc_managed_class.txt
deleted file mode 100644
index 4102e86b322c40b58b948a1b3d0880c06661b2d2..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/own_ptr_to_gc_managed_class.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-In file included from own_ptr_to_gc_managed_class.cpp:5:
-./own_ptr_to_gc_managed_class.h:14:1: warning: [blink-gc] Class 'PartObject' contains invalid fields.
-class PartObject {
-^
-./own_ptr_to_gc_managed_class.h:17:5: note: [blink-gc] OwnPtr field 'm_obj' to a GC managed class declared here:
-    OwnPtr<HeapObject> m_obj;
-    ^
-./own_ptr_to_gc_managed_class.h:20:1: warning: [blink-gc] Class 'HeapObject' contains invalid fields.
-class HeapObject : public GarbageCollectedFinalized<HeapObject> {
-^
-./own_ptr_to_gc_managed_class.h:24:5: note: [blink-gc] OwnPtr field 'm_objs' to a GC managed class declared here:
-    Vector<OwnPtr<HeapObject> > m_objs;
-    ^
-./own_ptr_to_gc_managed_class.h:25:5: note: [blink-gc] OwnPtr field 'm_objs2' to a GC managed class declared here:
-    OwnPtr<HeapVector<Member<HeapObject> > > m_objs2;
-    ^
-2 warnings generated.