Revert "[libFuzzer] Expose fuzzer::FuzzerDriver()"

This reverts commit 22a376e73bc218137738ee4ac8af44e223576475.

GitOrigin-RevId: 540b92147da0e9a2c2d096505eb0785ec79f2024
diff --git a/FuzzerDefs.h b/FuzzerDefs.h
index fb9eccd..1a2752a 100644
--- a/FuzzerDefs.h
+++ b/FuzzerDefs.h
@@ -20,7 +20,6 @@
 #include <string>
 #include <vector>
 
-#include "FuzzerPlatform.h"
 
 namespace fuzzer {
 
@@ -63,8 +62,7 @@
 typedef Vector<Unit> UnitVector;
 typedef int (*UserCallback)(const uint8_t *Data, size_t Size);
 
-ATTRIBUTE_INTERFACE int FuzzerDriver(int *argc, char ***argv,
-                                     UserCallback Callback);
+int FuzzerDriver(int *argc, char ***argv, UserCallback Callback);
 
 uint8_t *ExtraCountersBegin();
 uint8_t *ExtraCountersEnd();