Revert "I dunno what this is but AA wanted it"

This reverts commit 073dc5b8b5.

code/modules/unit_tests/origin_tech.dm

@@ -1,11 +0,0 @@
-/datum/unit_test/origin_tech_test/Run()
-	var/regex/nums = regex("^\[0-9]+")
-	for(var/tpath in subtypesof(/obj/item))
-    	var/obj/item/I = tpath
-    	var/tech_str = initial(I.origin_tech)
-
-    	var/list/tech_list = params2list(tech_str)
-
-    	for(var/k in tech_list)
-    	if(length(nums.Replace(tech_list[k], "")) > 0)
-        	Fail("Invalid origin tech for [tpath]: [tech_str]")