code: func removeOpcode(pkscript []parsedOpcode, opcode byte) []parsedOpcode {
  	retScript := make([]parsedOpcode, 0, len(pkscript))
  	for _, pop := range pkscript {
  		if pop.opcode.value != opcode {
  			retScript = append(retScript, pop)
  		}
  	}
  	return retScript
  }
docs: // removeOpcode will remove any opcode matching ``opcode'' from the opcode
  // stream in pkscript