Removing par.rs, since it's not usable now anyway.

Author: eholk

src/libstd/par.rs

@@ -19,7 +19,6 @@ export bitv, deque, fun_treemap, list, map, smallintmap, sort, treemap;
 export rope, arena;
 export ebml, dbg, getopts, json, rand, sha1, term, time, prettyprint;
 export test, tempfile, serialization;
-export par;
 
 // General io and system-services modules
 
@@ -59,7 +58,6 @@ mod getopts;
 mod json;
 mod sha1;
 mod md4;
-mod par;
 mod tempfile;
 mod term;
 mod time;