Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/CPP/7zip/Archive/7z/7zHeader.cpp

Index: third_party/lzma/v4_65/files/CPP/7zip/Archive/7z/7zHeader.cpp
diff --git a/third_party/lzma/v4_65/files/CPP/7zip/Archive/7z/7zHeader.cpp b/third_party/lzma/v4_65/files/CPP/7zip/Archive/7z/7zHeader.cpp
deleted file mode 100644
index f232a23ee6e7f95a33ae70d5ae2418ae22242c88..0000000000000000000000000000000000000000
--- a/third_party/lzma/v4_65/files/CPP/7zip/Archive/7z/7zHeader.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-// 7z/Header.cpp
-
-#include "StdAfx.h"
-#include "7zHeader.h"
-
-namespace NArchive {
-namespace N7z {
-
-Byte kSignature[kSignatureSize] = {'7' + 1, 'z', 0xBC, 0xAF, 0x27, 0x1C};
-#ifdef _7Z_VOL
-Byte kFinishSignature[kSignatureSize] = {'7' + 1, 'z', 0xBC, 0xAF, 0x27, 0x1C + 1};
-#endif
-
-class SignatureInitializer
-{
-public:
-  SignatureInitializer()
-  {
-    kSignature[0]--;
-    #ifdef _7Z_VOL
-    kFinishSignature[0]--;
-    #endif
-  };
-} g_SignatureInitializer;
-
-}}
-