Remove dead code HAVE_LZO1X

MariaDB uses HAVE_LZO, not HAVE_LZO1X (which was never defined).
Also, the variable srv_lzo_disabled was never defined or read
(only declared and assigned to, in unreachable code).

storage/innobase/srv/srv0start.cc

@@ -109,11 +109,6 @@ Created 2/16/1996 Heikki Tuuri
 #include "btr0scrub.h"
 #include "ut0new.h"
 
-#ifdef HAVE_LZO1X
-#include <lzo/lzo1x.h>
-extern bool srv_lzo_disabled;
-#endif /* HAVE_LZO1X */
-
 /** Log sequence number immediately after startup */
 lsn_t	srv_start_lsn;
 /** Log sequence number at shutdown */
@@ -1519,16 +1514,6 @@ innobase_start_or_create_for_mysql()
 		srv_use_doublewrite_buf = FALSE;
 	}
 
-#ifdef HAVE_LZO1X
-	if (lzo_init() != LZO_E_OK) {
-		ib::warn() << "lzo_init() failed, support disabled";
-		srv_lzo_disabled = true;
-	} else {
-		ib::info() << "LZO1X support available";
-		srv_lzo_disabled = false;
-	}
-#endif /* HAVE_LZO1X */
-
 	compile_time_assert(sizeof(ulint) == sizeof(void*));
 
 #ifdef UNIV_DEBUG