Remove unused Print/PrintHex functions

You can just use HexStr(script) or script.ToString() for debugging, no
need for these extra functions.

src/script.cpp

@@ -838,10 +838,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
                     valtype& vchSig    = stacktop(-2);
                     valtype& vchPubKey = stacktop(-1);
 
-                    ////// debug print
-                    //PrintHex(vchSig.begin(), vchSig.end(), "sig: %s\n");
-                    //PrintHex(vchPubKey.begin(), vchPubKey.end(), "pubkey: %s\n");
-
                     // Subset of script starting at the most recent codeseparator
                     CScript scriptCode(pbegincodehash, pend);