removed unused import

Author: Kaustuvi

lib/quantum-circuit.js

@@ -7,7 +7,6 @@
  * the LICENSE.txt file in the root directory of this source tree.
  */
 
-const { i, typeOf } = require("mathjs");
 var math = require("mathjs");
 
 var QASMImport = require("./qasm_import/QASMImport.js");