updated to scala-2.12.3;

--- a/Admin/components/components.sha1	Mon Aug 14 14:41:22 2017 +0200
+++ b/Admin/components/components.sha1	Mon Aug 14 15:30:26 2017 +0200
@@ -169,6 +169,7 @@
 3eca4b80710996fff87ed1340dcea2c5f6ebf4f7  scala-2.11.8.tar.gz
 0004e53f885fb165b50c95686dec40d99ab0bdbd  scala-2.12.0.tar.gz
 74a8c3dab3a25a87357996ab3e95d825dc820fd0  scala-2.12.2.tar.gz
+d66796a68ec3254b46b17b1f8ee5bcc56a93aacf  scala-2.12.3.tar.gz
 b447017e81600cc5e30dd61b5d4962f6da01aa80  scala-2.8.1.final.tar.gz
 5659440f6b86db29f0c9c0de7249b7e24a647126  scala-2.9.2.tar.gz
 43b5afbcad575ab6817d2289756ca22fd2ef43a9  spass-3.8ds.tar.gz

--- a/Admin/components/main	Mon Aug 14 14:41:22 2017 +0200
+++ b/Admin/components/main	Mon Aug 14 15:30:26 2017 +0200
@@ -12,7 +12,7 @@
 nunchaku-0.3
 polyml-5.6-1
 postgresql-42.1.1
-scala-2.12.2
+scala-2.12.3
 ssh-java-20161009
 spass-3.8ds
 sqlite-jdbc-3.18.0-1

--- a/src/Pure/General/timing.ML	Mon Aug 14 14:41:22 2017 +0200
+++ b/src/Pure/General/timing.ML	Mon Aug 14 15:30:26 2017 +0200
@@ -119,4 +119,3 @@
 
 structure Basic_Timing: BASIC_TIMING = Timing;
 open Basic_Timing;
-

--- a/src/Pure/PIDE/document_id.scala	Mon Aug 14 14:41:22 2017 +0200
+++ b/src/Pure/PIDE/document_id.scala	Mon Aug 14 15:30:26 2017 +0200
@@ -22,4 +22,3 @@
   def apply(id: Generic): String = Value.Long.apply(id)
   def unapply(s: String): Option[Generic] = Value.Long.unapply(s)
 }
-