Using perl single liner, how to remove ” around all column names in first row from a file.

Unable to delete double-quotes around column names only.

Input file
“FNAME”,”LNAME”
“A1B1″,”XYZ”
“A1B2″,”X12”

Output file without double-quotes around column names.
FNAME,LNAME
“A1B1″,”XYZ”
“A1B2″,”X12”