Remove excessive constant declarations

When all .cc files are #included from a single master C++ file,
repetitive constant definitions - although the constant value remains
the same - makes MSVC error out.

Besides, it is not a good practice to redefine same constant over and
over again. It defies the main idea of constants: "define once, use
many times".

internal/cldutil_offline.cc

@@ -20,8 +20,6 @@
 #include "tote.h"
 #include <string>
 
-static const int kMinCJKUTF8CharBytes = 3;
-
 //------------------------------------------------------------------------------
 // Offline: used by mapreduce or table construction
 //------------------------------------------------------------------------------