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

third_party/lzma/v4_65/files/C/7zBuf.c

Index: third_party/lzma/v4_65/files/C/7zBuf.c
diff --git a/third_party/lzma/v4_65/files/C/7zBuf.c b/third_party/lzma/v4_65/files/C/7zBuf.c
deleted file mode 100644
index 14e7f4e2b92215c6a6ba4186917b4602d620fe9a..0000000000000000000000000000000000000000
--- a/third_party/lzma/v4_65/files/C/7zBuf.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/* 7zBuf.c -- Byte Buffer
-2008-03-28
-Igor Pavlov
-Public domain */
-
-#include "7zBuf.h"
-
-void Buf_Init(CBuf *p)
-{
-  p->data = 0;
-  p->size = 0;
-}
-
-int Buf_Create(CBuf *p, size_t size, ISzAlloc *alloc)
-{
-  p->size = 0;
-  if (size == 0)
-  {
-    p->data = 0;
-    return 1;
-  }
-  p->data = (Byte *)alloc->Alloc(alloc, size);
-  if (p->data != 0)
-  {
-    p->size = size;
-    return 1;
-  }
-  return 0;
-}
-
-void Buf_Free(CBuf *p, ISzAlloc *alloc)
-{
-  alloc->Free(alloc, p->data);
-  p->data = 0;
-  p->size = 0;
-}