chiptod: Remove unused prototype from header

There is prototype for chiptod_reset_tb() in include/chiptod.h. However
no definition is ever provided, nor is it ever used. Remove the
prototype.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

include/chiptod.h

@@ -34,7 +34,6 @@ extern bool tfmr_recover_local_errors(uint64_t tfmr);
 extern bool recover_corrupt_tfmr(void);
 extern void tfmr_cleanup_core_errors(uint64_t tfmr);
 extern int tfmr_clear_core_errors(uint64_t tfmr);
-extern void chiptod_reset_tb(void);
 extern bool chiptod_adjust_topology(enum chiptod_topology topo, bool enable);
 extern bool chiptod_capp_timebase_sync(unsigned int chip_id, uint32_t tfmr_addr,
 				       uint32_t tb_addr, uint32_t offset);