Remove set-but-not-used log_sys.log.state

storage/innobase/include/log0log.h

@@ -495,14 +495,6 @@ Stored in LOG_HEADER_FORMAT. */
 					header */
 #define LOG_FILE_HDR_SIZE	(4 * OS_FILE_LOG_BLOCK_SIZE)
 
-/** The state of a log group */
-enum log_group_state_t {
-	/** No corruption detected */
-	LOG_GROUP_OK,
-	/** Corrupted */
-	LOG_GROUP_CORRUPTED
-};
-
 typedef ib_mutex_t	LogSysMutex;
 typedef ib_mutex_t	FlushOrderMutex;
 
@@ -560,8 +552,6 @@ struct log_t{
     ulint				format;
     /** individual log file size in bytes, including the header */
     lsn_t				file_size;
-    /** corruption status */
-    log_group_state_t		state;
     /** lsn used to fix coordinates within the log group */
     lsn_t				lsn;
     /** the byte offset of the above lsn */

storage/innobase/log/log0log.cc

@@ -671,7 +671,6 @@ void log_t::files::create(ulint n_files)
     ? LOG_HEADER_FORMAT_CURRENT | LOG_HEADER_FORMAT_ENCRYPTED
     : LOG_HEADER_FORMAT_CURRENT;
   file_size= srv_log_file_size;
-  state= LOG_GROUP_OK;
   lsn= LOG_START_LSN;
   lsn_offset= LOG_FILE_HDR_SIZE;
 

storage/innobase/log/log0recv.cc

@@ -834,8 +834,6 @@ recv_find_max_checkpoint_0(ulint* max_field)
 			*max_field = field;
 			max_no = checkpoint_no;
 
-			log_sys.log.state = LOG_GROUP_OK;
-
 			log_sys.log.lsn = mach_read_from_8(
 				buf + LOG_CHECKPOINT_LSN);
 			log_sys.log.lsn_offset = static_cast<ib_uint64_t>(
@@ -930,8 +928,6 @@ recv_find_max_checkpoint(ulint* max_field)
 
 	buf = log_sys.checkpoint_buf;
 
-	log_sys.log.state = LOG_GROUP_CORRUPTED;
-
 	log_header_read(0);
 	/* Check the header page checksum. There was no
 	checksum in the first redo log format (version 0). */
@@ -998,7 +994,6 @@ recv_find_max_checkpoint(ulint* max_field)
 		if (checkpoint_no >= max_no) {
 			*max_field = field;
 			max_no = checkpoint_no;
-			log_sys.log.state = LOG_GROUP_OK;
 			log_sys.log.lsn = mach_read_from_8(
 				buf + LOG_CHECKPOINT_LSN);
 			log_sys.log.lsn_offset = mach_read_from_8(