Fixing duplication of OP_CHECKSIGVERIFY, fixing comment

src/main/scala/org/bitcoins/script/crypto/CryptoInterpreter.scala

@@ -120,34 +120,8 @@ trait CryptoInterpreter extends ControlOperationsInterpreter with BitcoinSLogger
     }
   }
 
-
-
   /**
-    * Runs OP_CHECKMULTISIG with an OP_VERIFY afterwards
+    * Runs OP_CHECKSIG with an OP_VERIFY afterwards
-    * @param program
-    * @return
-    */
-  def opCheckSigVerify(program : ScriptProgram) : ScriptProgram = {
-    require(program.script.headOption.isDefined && program.script.head == OP_CHECKSIGVERIFY,
-      "Script top must be OP_CHECKSIGVERIFY")
-    if (program.stack.size < 2) {
-      logger.error("Stack must contain at least 3 items for OP_CHECKSIGVERIFY")
-      ScriptProgram(program,ScriptErrorInvalidStackOperation)
-    } else {
-      val newScript = OP_CHECKSIG :: OP_VERIFY :: program.script.tail
-      val newProgram = ScriptProgram(program,newScript, ScriptProgram.Script)
-      val programFromOpCheckSig = opCheckSig(newProgram)
-      logger.debug("Stack after OP_CHECKSIG execution: " + programFromOpCheckSig.stack)
-      programFromOpCheckSig match {
-        case _ : PreExecutionScriptProgram | _ : ExecutedScriptProgram =>
-          programFromOpCheckSig
-        case _ : ExecutionInProgressScriptProgram => opVerify(programFromOpCheckSig)
-      }
-    }
-  }
-
-  /**
-    * Runs OP_CHECKMULTISIG with an OP_VERIFY afterwards
     * @param program
     * @return
     */