remove use statements from main.rs that temporary replaced extern crate and fixed paths that previously used them

src/debray_allocator.rs

@@ -1,7 +1,7 @@
-use crate::indexmap::IndexMap;
+use indexmap::IndexMap;
 
-use crate::prolog_parser_rebis::ast::*;
-use crate::prolog_parser_rebis::temp_v;
+use prolog_parser_rebis::ast::*;
+use prolog_parser_rebis::temp_v;
 
 use crate::allocator::*;
 use crate::fixtures::*;