tsan: remove non-existent MemoryAccessRangeStep

Probably was used for Go at some point...

Depends on D107466.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D107467

Author: dvyukov

compiler-rt/lib/tsan/rtl/tsan_rtl.h

@@ -699,8 +699,6 @@ void MemoryAccessImpl(ThreadState *thr, uptr addr,
     u64 *shadow_mem, Shadow cur);
 void MemoryAccessRange(ThreadState *thr, uptr pc, uptr addr,
     uptr size, bool is_write);
-void MemoryAccessRangeStep(ThreadState *thr, uptr pc, uptr addr,
-    uptr size, uptr step, bool is_write);
 void UnalignedMemoryAccess(ThreadState *thr, uptr pc, uptr addr, uptr size,
                            AccessType typ);