MINOR: cpu-map: remove obsolete diag warning about combined ranges

We used to emit a diag warning in case ranges were used both with the
process and thread part of a thread spec. Now with groups it's not
longer a problem, so let's just kill this warning.

src/cfgparse-global.c

@@ -1134,9 +1134,6 @@ int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
 					}
 				}
 			}
-
-			HA_DIAG_WARNING_COND(tgroup != 0x1 && thread != 0x1,
-			                     "parsing [%s:%d] : cpu-map statement is considered invalid and thus ignored as it addresses multiple groups and threads at the same time. At least one of them should be 1 and only 1.", file, linenum);
 		}
 #else
 		ha_alert("parsing [%s:%d] : '%s' is not enabled, please check build options for USE_CPU_AFFINITY.\n",