Remove unused typedef

This removes unused typedef left in change:
https://chromium-review.googlesource.com/c/447697/
and fixes error:
dump_symbols.cc:613:35: error: unused typedef 'Word' [-Werror,-Wunused-local-typedef]

Change-Id: Ib5a82cd8af9a58ebf173b0f338fa9ad341819ef3
Reviewed-on: https://chromium-review.googlesource.com/459518
Reviewed-by: Mark Mentovai <mark@chromium.org>
diff --git a/src/common/linux/dump_symbols.cc b/src/common/linux/dump_symbols.cc
index 5ef766f..d029ca1 100644
--- a/src/common/linux/dump_symbols.cc
+++ b/src/common/linux/dump_symbols.cc
@@ -610,7 +610,6 @@
   typedef typename ElfClass::Addr Addr;
   typedef typename ElfClass::Phdr Phdr;
   typedef typename ElfClass::Shdr Shdr;
-  typedef typename ElfClass::Word Word;
 
   Addr loading_addr = GetLoadingAddress<ElfClass>(
       GetOffset<ElfClass, Phdr>(elf_header, elf_header->e_phoff),