Remove deprecated headers from mojo/public/{c,cpp}/system.

mojo/public/c/system/wait.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file contains basic functions common to different Mojo system APIs.
 //
 // Note: This header should be compilable as C.
 
 #ifndef MOJO_PUBLIC_C_SYSTEM_WAIT_H_
 #define MOJO_PUBLIC_C_SYSTEM_WAIT_H_
@@ skipping 84 matching lines @@
 //       handles satisfying any of its signals.
 //   |MOJO_RESULT_FAILED_PRECONDITION| if it is or becomes impossible that SOME
 //       |handle[i]| will ever satisfy any of the signals in |signals[i]|.
 //   |MOJO_RESULT_BUSY| if some |handle[i]| is currently in use in some
 //       transaction (that, e.g., may result in it being invalidated, such as
 //       being sent in a message).
 MojoResult MojoWaitMany(const MojoHandle* MOJO_RESTRICT handles,         // In.
                         const MojoHandleSignals* MOJO_RESTRICT signals,  // In.
                         uint32_t num_handles,                            // In.
                         MojoDeadline deadline,                           // In.
-                        uint32_t* MOJO_RESTRICT result_index,  // Optional out
+                        uint32_t* MOJO_RESTRICT result_index,  // Optional out.
                         struct MojoHandleSignalsState* MOJO_RESTRICT
-                            signals_states);  // Optional out
+                            signals_states);  // Optional out.
 
 MOJO_END_EXTERN_C
 
 #endif  // MOJO_PUBLIC_C_SYSTEM_WAIT_H_