remove duplicate token that emited by SSACGenerator.VisitVarDeclNode()
remove duplicate token that emited by SSACGenerator.VisitVarDeclNode()

syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot,syohex/libbun-snapshot