Remove external/timezonepicker-support

external/timezonepicker-support holds old versions
of time zone data files that don't appear to be
referenced. Removing this from the manifest should
expose hidden users, if any.
Bug: 21548934
Test: Treehugger only
Change-Id: Id3c30a7c4d13a37c8cde67b1c13cef59263e46c0

default.xml

@@ -363,7 +363,6 @@
   <project path="external/tcpdump" name="platform/external/tcpdump" groups="pdk" />
   <project path="external/tensorflow" name="platform/external/tensorflow" groups="pdk" />
   <project path="external/testng" name="platform/external/testng" groups="pdk" />
-  <project path="external/timezonepicker-support" name="platform/external/timezonepicker-support" groups="pdk" />
   <project path="external/tinyalsa" name="platform/external/tinyalsa" groups="pdk" />
   <project path="external/tinycompress" name="platform/external/tinycompress" groups="pdk" />
   <project path="external/tinyxml" name="platform/external/tinyxml" groups="pdk" />