Merge pull request #4368 from Tastyfish/manifest-oops

Unbreaks the pda manifest

code/game/objects/effects/datacore-effect.dm

@@ -141,7 +141,6 @@ using /obj/effect/datacore/proc/manifest_inject( ), or manifest_insert( )
 */
 
 var/global/list/PDA_Manifest = list()
-var/global/ManifestJSON
 
 /obj/effect/datacore/proc/get_manifest_json()
 	if(PDA_Manifest.len)
@@ -224,6 +223,5 @@ var/global/ManifestJSON
 		"bot" = bot,\
 		"misc" = misc\
 		)
-	ManifestJSON = json_encode(PDA_Manifest)
 	return