[libFuzzer] refactoring: move the Corpus into a separate class; delete two unused experimental features

llvm-svn: 282042
diff --git a/llvm/lib/Fuzzer/FuzzerIO.cpp b/llvm/lib/Fuzzer/FuzzerIO.cpp
index 0e0c4e9..5b394b64 100644
--- a/llvm/lib/Fuzzer/FuzzerIO.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIO.cpp
@@ -30,7 +30,7 @@
   return S_ISREG(St.st_mode);
 }
 
-static long GetEpoch(const std::string &Path) {
+long GetEpoch(const std::string &Path) {
   struct stat St;
   if (stat(Path.c_str(), &St))
     return 0;  // Can't stat, be conservative.