diff --git a/zomp/lib/otpr/zx/0.3.0/src/zx_lib.erl b/zomp/lib/otpr/zx/0.3.0/src/zx_lib.erl
index c142168..84787c4 100644
--- a/zomp/lib/otpr/zx/0.3.0/src/zx_lib.erl
+++ b/zomp/lib/otpr/zx/0.3.0/src/zx_lib.erl
@@ -34,7 +34,6 @@
          build/0,
          rm_rf/1, rm/1,
          enqueue_unique/2,
-         time_diff/2, elapsed_time/1,
          b_to_t/1, b_to_ts/1]).
 
 -include("zx_logger.hrl").
@@ -730,25 +729,6 @@ enqueue_unique(Term, Queue) ->
     end.
 
 
--spec time_diff(Before, After) -> Diff
-    when Before :: calendar:datetime(),
-         After  :: calendar:datetime(),
-         Diff   :: integer().
-
-time_diff(Before, After) ->
-    Early = calendar:datetime_to_gregorian_seconds(Before),
-    Late  = calendar:datetime_to_gregorian_seconds(After),
-    Late - Early.
-
-
--spec elapsed_time(Timestamp) -> Diff
-    when Timestamp :: calendar:datetime(),
-         Diff      :: integer().
-
-elapsed_time(Timestamp) ->
-    time_diff(Timestamp, calendar:universal_time()).
-
-
 -spec b_to_t(binary()) -> {ok, term()} | error.
 %% @private
 %% A wrapper for the binary_to_term/1 BIF to hide the try..catch mess in the places we