Log variables moved to log_manager.h

The log manager variables lm_enabled_log_files_bitmask, log_ses_count
and tls_log_info that earlier were declared separately in every
c-file are now declared in the log_manager.h header.

server/modules/routing/schemarouter/sharding_common.c

@@ -18,11 +18,6 @@
 
 #include <sharding_common.h>
 
-/** Defined in log_manager.cc */
-extern int            lm_enabled_logfiles_bitmask;
-extern size_t         log_ses_count[];
-extern __thread log_info_t tls_log_info;
-
 /**
  * Extract the database name from a COM_INIT_DB or literal USE ... query.
  * @param buf Buffer with the database change query