how can i delete columns beginning and ending with parenthesis in a file
===

**Expectd Input - content of input.txt**<br>        

    ABC (BCD) EFG    
    BCD (ABC) (BCD) 
    DEF  BCD (ABC)  
    EFG HI(JKL)
**Expectd Output -- content of output.txt**<br>    

    ABC EFG    
    BCD    
    DEF BCD
    EFG HI(JKL)    
