Remove tinyxml from the manifest.

Finally!

Bug: http://b/30215664
Test: treehugger
Change-Id: I440efdfa83649255b807b640bbb42dcb8adc2ff7
diff --git a/default.xml b/default.xml
index abbe485..aa60170 100644
--- a/default.xml
+++ b/default.xml
@@ -564,7 +564,6 @@
   <project path="external/timezone-boundary-builder" name="platform/external/timezone-boundary-builder" groups="pdk" clone-depth="2" />
   <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" />
   <project path="external/tinyxml2" name="platform/external/tinyxml2" groups="pdk" />
   <project path="external/toolchain-utils" name="platform/external/toolchain-utils" />
   <project path="external/toybox" name="platform/external/toybox" groups="pdk" />