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

tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.txt

Index: tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.txt
diff --git a/tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.txt b/tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.txt
deleted file mode 100644
index 36b54312c4382bbb70845205fd510484f12c1bcc..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-In file included from class_requires_finalization_base.cpp:5:
-./class_requires_finalization_base.h:23:1: warning: [blink-gc] Class 'NeedsFinalizer' requires finalization.
-class NeedsFinalizer : public A, public B {
-^
-./class_requires_finalization_base.h:23:34: note: [blink-gc] Base class 'B' requiring finalization declared here:
-class NeedsFinalizer : public A, public B {
-                                 ^
-./class_requires_finalization_base.h:40:1: warning: [blink-gc] Class 'GCedClassWithAScriptWrappableAndAFinalizableBase' requires finalization.
-class GCedClassWithAScriptWrappableAndAFinalizableBase
-^
-./class_requires_finalization_base.h:42:7: note: [blink-gc] Base class 'B' requiring finalization declared here:
-    , public B
-      ^
-2 warnings generated.