Trim ICU data to reduce the download size/memory usage

icu52/source/data/lang/en_GB.txt

Index: icu52/source/data/lang/en_GB.txt
===================================================================
--- icu52/source/data/lang/en_GB.txt	(revision 259715)
+++ icu52/source/data/lang/en_GB.txt	(working copy)
@@ -8,15 +8,7 @@
 // ***************************************************************************
 en_GB{
     %%Parent{"en_001"}
-    Keys{
-        colCaseLevel{"Case-Sensitive Sorting"}
-        colNormalization{"Normalised Sorting"}
-    }
     Languages{
-        arn{"Araucanian"}
-        bax{"Bamum"}
-        tzm{"Central Morocco Tamazight"}
-        wal{"Walamo"}
     }
     LanguagesShort{
         en_GB{"UK English"}
@@ -25,14 +17,5 @@
     Scripts{
         Thai{"Thai"}
     }
-    Types{
-        colNormalization{
-            no{"Sort Without Normalisation"}
-            yes{"Sort Unicode Normalised"}
-        }
-        numbers{
-            fullwide{"Full-Width Digits"}
-        }
-    }
     Version{"2.0.92.80"}
 }