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

tools/clang/blink_gc_plugin/tests/trace_after_dispatch_impl_error.txt

Index: tools/clang/blink_gc_plugin/tests/trace_after_dispatch_impl_error.txt
diff --git a/tools/clang/blink_gc_plugin/tests/trace_after_dispatch_impl_error.txt b/tools/clang/blink_gc_plugin/tests/trace_after_dispatch_impl_error.txt
deleted file mode 100644
index 058fccb8c3192763fe0272c6d083ff1cc6b02327..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/trace_after_dispatch_impl_error.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-trace_after_dispatch_impl_error.cpp:10:1: warning: [blink-gc] Missing dispatch to class 'TraceAfterDispatchInlinedDerived' in manual trace dispatch.
-inline void TraceAfterDispatchInlinedBase::traceImpl(
-^
-trace_after_dispatch_impl_error.cpp:35:1: warning: [blink-gc] Missing dispatch to class 'TraceAfterDispatchExternDerived' in manual trace dispatch.
-inline void TraceAfterDispatchExternBase::traceImpl(VisitorDispatcher visitor) {
-^
-In file included from trace_after_dispatch_impl_error.cpp:5:
-./trace_after_dispatch_impl_error.h:39:3: warning: [blink-gc] Class 'TraceAfterDispatchInlinedBase' has untraced fields that require tracing.
-  void traceAfterDispatchImpl(VisitorDispatcher visitor) {
-  ^
-./trace_after_dispatch_impl_error.h:44:3: note: [blink-gc] Untraced field 'x_base_' declared here:
-  Member<X> x_base_;
-  ^
-./trace_after_dispatch_impl_error.h:58:3: warning: [blink-gc] Base class 'TraceAfterDispatchInlinedBase' of derived class 'TraceAfterDispatchInlinedDerived' requires tracing.
-  void traceAfterDispatchImpl(VisitorDispatcher visitor) {
-  ^
-./trace_after_dispatch_impl_error.h:58:3: warning: [blink-gc] Class 'TraceAfterDispatchInlinedDerived' has untraced fields that require tracing.
-./trace_after_dispatch_impl_error.h:62:3: note: [blink-gc] Untraced field 'x_derived_' declared here:
-  Member<X> x_derived_;
-  ^
-trace_after_dispatch_impl_error.cpp:55:1: warning: [blink-gc] Class 'TraceAfterDispatchExternBase' has untraced fields that require tracing.
-inline void TraceAfterDispatchExternBase::traceAfterDispatchImpl(
-^
-./trace_after_dispatch_impl_error.h:84:3: note: [blink-gc] Untraced field 'x_base_' declared here:
-  Member<X> x_base_;
-  ^
-trace_after_dispatch_impl_error.cpp:70:1: warning: [blink-gc] Base class 'TraceAfterDispatchExternBase' of derived class 'TraceAfterDispatchExternDerived' requires tracing.
-inline void TraceAfterDispatchExternDerived::traceAfterDispatchImpl(
-^
-trace_after_dispatch_impl_error.cpp:70:1: warning: [blink-gc] Class 'TraceAfterDispatchExternDerived' has untraced fields that require tracing.
-./trace_after_dispatch_impl_error.h:98:3: note: [blink-gc] Untraced field 'x_derived_' declared here:
-  Member<X> x_derived_;
-  ^
-8 warnings generated.