Rollup merge of rust-lang#31184 - arielb1:remove-implicator, r=nikomatsakis

it is pre-RFC1214 junk and completely useless.

r? @nikomatsakis

Author: Manishearth

src/librustc/lib.rs

@@ -108,7 +108,6 @@ pub mod middle {
     pub mod free_region;
     pub mod intrinsicck;
     pub mod infer;
-    pub mod implicator;
     pub mod lang_items;
     pub mod liveness;
     pub mod mem_categorization;