Simplify table specs.

include/syn.hrl

@@ -28,7 +28,7 @@
 %% ==========================================================================================================
 %% records
 -record(syn_processes_table, {
-    key = undefined :: undefined | any(),
+    key = undefined :: any(),
     pid = undefined :: undefined | pid() | atom(),
     node = undefined :: atom(),
     meta = undefined :: any()