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

tools/clang/blink_gc_plugin/tests/raw_ptr_to_gc_managed_class.txt

Index: tools/clang/blink_gc_plugin/tests/raw_ptr_to_gc_managed_class.txt
diff --git a/tools/clang/blink_gc_plugin/tests/raw_ptr_to_gc_managed_class.txt b/tools/clang/blink_gc_plugin/tests/raw_ptr_to_gc_managed_class.txt
deleted file mode 100644
index 463e9aebb366c2ed981998414d775b20b38b5344..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/raw_ptr_to_gc_managed_class.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-In file included from raw_ptr_to_gc_managed_class.cpp:5:
-./raw_ptr_to_gc_managed_class.h:14:1: warning: [blink-gc] Class 'PartObject' contains invalid fields.
-class PartObject {
-^
-./raw_ptr_to_gc_managed_class.h:19:5: note: [blink-gc] Raw pointer field 'm_obj' to a GC managed class declared here:
-    RawPtr<HeapObject> m_obj;
-    ^
-./raw_ptr_to_gc_managed_class.h:20:5: note: [blink-gc] Raw pointer field 'm_rawObj' to a GC managed class declared here:
-    HeapObject* m_rawObj;
-    ^
-./raw_ptr_to_gc_managed_class.h:21:5: note: [blink-gc] Reference pointer field 'm_refObj' to a GC managed class declared here:
-    HeapObject& m_refObj;
-    ^
-./raw_ptr_to_gc_managed_class.h:24:1: warning: [blink-gc] Class 'HeapObject' contains invalid fields.
-class HeapObject : public GarbageCollected<HeapObject> {
-^
-./raw_ptr_to_gc_managed_class.h:29:5: note: [blink-gc] Raw pointer field 'm_objs' to a GC managed class declared here:
-    HeapVector<HeapObject*> m_objs;
-    ^
-2 warnings generated.