Remove unused parameter has_dict_mutex of dict_update_statistics_low()

Also delete dict_update_statistics() and rename dict_update_statistics_low()
to dict_update_statistics() because the only thing that distinguished those
two functions was the removed parameter.

storage/innodb_plugin/dict/dict0dict.c

@@ -4213,16 +4213,13 @@ Calculates new estimates for table and index statistics. The statistics
 are used in query optimization. */
 UNIV_INTERN
 void
-dict_update_statistics_low(
-/*=======================*/
+dict_update_statistics(
+/*===================*/
 	dict_table_t*	table,		/*!< in/out: table */
-	ibool		only_calc_if_missing_stats,/*!< in: only
+	ibool		only_calc_if_missing_stats)/*!< in: only
 					update/recalc the stats if they have
 					not been initialized yet, otherwise
 					do nothing */
-	ibool		has_dict_mutex __attribute__((unused)))
-					/*!< in: TRUE if the caller has the
-					dictionary mutex */
 {
 	dict_index_t*	index;
 	ulint		sum_of_index_sizes	= 0;
@@ -4316,22 +4313,6 @@ dict_update_statistics_low(
 	dict_table_stats_unlock(table, RW_X_LATCH);
 }
 
-/*********************************************************************//**
-Calculates new estimates for table and index statistics. The statistics
-are used in query optimization. */
-UNIV_INTERN
-void
-dict_update_statistics(
-/*===================*/
-	dict_table_t*	table,	/*!< in/out: table */
-	ibool		only_calc_if_missing_stats)/*!< in: only
-					update/recalc the stats if they have
-					not been initialized yet, otherwise
-					do nothing */
-{
-	dict_update_statistics_low(table, only_calc_if_missing_stats, FALSE);
-}
-
 /**********************************************************************//**
 Prints info of a foreign key constraint. */
 static
@@ -4409,9 +4390,7 @@ dict_table_print_low(
 
 	ut_ad(mutex_own(&(dict_sys->mutex)));
 
-	dict_update_statistics_low(table,
-				   FALSE /* update even if initialized */,
-				   TRUE /* we have the dict mutex */);
+	dict_update_statistics(table, FALSE /* update even if initialized */);
 
 	dict_table_stats_lock(table, RW_S_LATCH);
 

storage/innodb_plugin/dict/dict0load.c

@@ -222,10 +222,8 @@ dict_print(void)
 			is no index */
 
 			if (dict_table_get_first_index(table)) {
-				dict_update_statistics_low(
-					table,
-					FALSE /* update even if initialized */,
-					TRUE /* we have the dict mutex */);
+				dict_update_statistics(table, FALSE /* update
+						       even if initialized */);
 			}
 
 			dict_table_print_low(table);

storage/innodb_plugin/include/dict0dict.h

@@ -1054,23 +1054,9 @@ Calculates new estimates for table and index statistics. The statistics
 are used in query optimization. */
 UNIV_INTERN
 void
-dict_update_statistics_low(
-/*=======================*/
-	dict_table_t*	table,		/*!< in/out: table */
-	ibool		only_calc_if_missing_stats,/*!< in: only
-					update/recalc the stats if they have
-					not been initialized yet, otherwise
-					do nothing */
-	ibool		has_dict_mutex);/*!< in: TRUE if the caller has the
-					dictionary mutex */
-/*********************************************************************//**
-Calculates new estimates for table and index statistics. The statistics
-are used in query optimization. */
-UNIV_INTERN
-void
 dict_update_statistics(
 /*===================*/
-	dict_table_t*	table,	/*!< in/out: table */
+	dict_table_t*	table,		/*!< in/out: table */
 	ibool		only_calc_if_missing_stats);/*!< in: only
 					update/recalc the stats if they have
 					not been initialized yet, otherwise