PPAPI: Remove out-dated or unnecessary TODOs from public files.

ppapi/c/ppb_file_system.h

Index: ppapi/c/ppb_file_system.h
diff --git a/ppapi/c/ppb_file_system.h b/ppapi/c/ppb_file_system.h
index a01853809bff4f8181dc70ee3f7cecd58145b61f..8eb94a15278fb33238f9d1fb2f8d042883a14435 100644
--- a/ppapi/c/ppb_file_system.h
+++ b/ppapi/c/ppb_file_system.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_file_system.idl modified Wed Feb 15 13:55:58 2012. */
+/* From ppb_file_system.idl modified Mon Mar 19 11:36:09 2012. */
 
 #ifndef PPAPI_C_PPB_FILE_SYSTEM_H_
 #define PPAPI_C_PPB_FILE_SYSTEM_H_
@@ -68,10 +68,6 @@ struct PPB_FileSystem_1_0 {
    *
    * @return An int32_t containing an error code from <code>pp_errors.h</code>.
    */
-  /*
-   * TODO(brettw) clarify whether this must have completed before a file can
-   * be opened in it. Clarify what it means to be "completed."
-   */
   int32_t (*Open)(PP_Resource file_system,
                   int64_t expected_size,
                   struct PP_CompletionCallback callback);