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

tools/clang/blink_gc_plugin/tests/stack_allocated.txt

Index: tools/clang/blink_gc_plugin/tests/stack_allocated.txt
diff --git a/tools/clang/blink_gc_plugin/tests/stack_allocated.txt b/tools/clang/blink_gc_plugin/tests/stack_allocated.txt
deleted file mode 100644
index 7fecd12f015a399531dc782edab08407e68d1c54..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/stack_allocated.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-In file included from stack_allocated.cpp:5:
-./stack_allocated.h:14:1: warning: [blink-gc] Class 'PartObject' requires a trace method.
-class PartObject {
-^
-./stack_allocated.h:17:5: note: [blink-gc] Untraced field 'm_obj' declared here:
-    Member<HeapObject> m_obj; // Needs tracing.
-    ^
-./stack_allocated.h:26:28: warning: [blink-gc] Stack-allocated class 'AnotherStackObject' derives class 'PartObject' which is not stack allocated.
-class AnotherStackObject : public PartObject { // Invalid base.
-                           ^
-./stack_allocated.h:32:1: warning: [blink-gc] Class 'HeapObject' contains invalid fields.
-class HeapObject : public GarbageCollected<HeapObject> {
-^
-./stack_allocated.h:36:5: note: [blink-gc] Stack-allocated field 'm_part' declared here:
-    StackObject m_part; // Cannot embed a stack allocated object.
-    ^
-stack_allocated.cpp:12:1: warning: [blink-gc] Class 'AnonStackObject' contains invalid fields.
-class AnonStackObject : public StackObject {
-^
-stack_allocated.cpp:14:5: note: [blink-gc] Raw pointer field 'm_obj' to a GC managed class declared here:
-    HeapObject* m_obj;
-    ^
-4 warnings generated.