libchrome: Remove fuzzed_data_provider. No longer needed to provided in libchrome since LLVM now includes FuzzedDataProvider.h as part of its builtin header files. BUG=chromium:1005307 TEST=fuzzer tryjob passes Cq-Depend: chromium:1816127 Change-Id: I65a7ebc8f1485115d071db0771d9d2e80392d5f1