(ha_innodb.cc:7202) Bug#55227 Fix compiler warnings in innodb with gcc 4.6

storage/innobase/handler/ha_innodb.cc

@@ -7199,7 +7199,6 @@ innobase_drop_database(
 	ulint	len		= 0;
 	trx_t*	trx;
 	char*	ptr;
-	int	error;
 	char*	namebuf;
 	THD*	thd		= current_thd;
 
@@ -7242,7 +7241,7 @@ innobase_drop_database(
 #else
 	trx = innobase_trx_allocate(thd);
 #endif
-	error = row_drop_database_for_mysql(namebuf, trx);
+	row_drop_database_for_mysql(namebuf, trx);
 	my_free(namebuf);
 
 	/* Flush the log to reduce probability that the .frm files and