Fix NetBSD build for r343409

Forgot to remove the method declaration from the header.

llvm-svn: 343411

lldb/source/Plugins/Process/NetBSD/NativeProcessNetBSD.h

@@ -112,7 +112,6 @@ private:
   void MonitorSIGTRAP(lldb::pid_t pid);
   void MonitorSignal(lldb::pid_t pid, int signal);
 
-  Status GetSoftwareBreakpointPCOffset(uint32_t &actual_opcode_size);
   Status FixupBreakpointPCAsNeeded(NativeThreadNetBSD &thread);
   Status PopulateMemoryRegionCache();
   void SigchldHandler();