make: unifdef for PARALLEL (undefined, this relates to the old pmake)

@@ -53,13 +53,10 @@
 #include <mksh/i18n.h>          /* get_char_semantics_value() */
 #include <mksh/macro.h>         /* getvar(), expand_value() */
 #include <mksh/misc.h>          /* getmem() */
 #include <poll.h>
 
-#ifdef PARALLEL
-#       include <rx/api.h>
-#endif
 
 #include <signal.h>
 
 #       include <stropts.h>
 

@@ -71,13 +68,11 @@
 #include <unistd.h>             /* close() */
 
 /*
  * Defined macros
  */
-#ifndef PARALLEL
 #       define LOCALHOST "localhost"
-#endif
 
 #define MAXRULES 100
 
 #if defined(DISTRIBUTED) || defined(MAKETOOL) /* tolik */
 #define SEND_MTOOL_MSG(cmds) \

@@ -545,15 +540,10 @@
                         delete_query_chain(line->body.line.query);
                 }
                 line->body.line.query = out_of_date_list;
         }
 
-#ifdef PARALLEL
-        if (doing_subtree) {
-                parallel = false;
-        }
-#endif
 
 /*
  * If the target is a :: type, do not try to find the rule for the target,
  * all actions will be taken by separate branches.
  * Else, we try to find an implicit rule using various methods,