Remove external/lzma

Change-Id: Ib14e94b252169bbf81ab8fe8e1a102e5e7fcb77f

default.xml

@@ -205,7 +205,6 @@
   <project path="external/lldb" name="platform/external/lldb" groups="pdk-cw-fs" />
   <project path="external/llvm" name="platform/external/llvm" groups="pdk" />
   <project path="external/ltrace" name="platform/external/ltrace" groups="pdk-cw-fs" />
-  <project path="external/lzma" name="platform/external/lzma" groups="pdk" />
   <project path="external/markdown" name="platform/external/markdown" groups="pdk-cw-fs" />
   <project path="external/mdnsresponder" name="platform/external/mdnsresponder" groups="pdk" />
   <project path="external/mesa3d" name="platform/external/mesa3d" groups="pdk-cw-fs" />