I want to delete a string "www.yahoo.com" only if the line starts with assign where host.name in [ and ends with ] and also if the string followed by comma(,) i need to delete that comma as well

assign where host.name in [ "www.google.com","www.yahoo.com","www.facebook.com" ] 

My output should looks like

assign where host.name in [ "www.google.com", "www.facebook.com" ] 

I dont know how to achieve this, Kindly give me some idea about this code

I want to delete a string "www.yahoo.com" only if the line starts with assign where host.name in [ and ends with ] and also if the string is followed by comma(,)  I need to delete that comma as well

assign where host.name in [ "www.google.com","www.yahoo.com","www.facebook.com" ] 

My output should look like

assign where host.name in [ "www.google.com", "www.facebook.com" ] 

I don't know how to achieve this.  Kindly give me some idea about this code.