[libFuzzer] Remove unused version of FuzzedDataProvider.h.

Summary: The actual version lives in compiler-rt/include/fuzzer/.

Reviewers: Dor1s

Reviewed By: Dor1s

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D67623

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@371997 91177308-0d34-0410-b5e6-96231b3b80d8

Author: dor1s