Removed extra comma in Mage_Captcha.csv (#4066)

Author: addison74

app/locale/en_US/Mage_Captcha.csv

@@ -19,5 +19,5 @@
 "Please type the letters from the image:","Please type the letters from the image:"
 "Please use only letters (a-z or A-Z) or numbers (0-9) in this field. No spaces or other characters are allowed.<br />Similar looking characters (e.g. ""i"", ""l"", ""1"") decrease chance of correct recognition by customer.","Please use only letters (a-z or A-Z) or numbers (0-9) in this field. No spaces or other characters are allowed.<br />Similar looking characters (e.g. ""i"", ""l"", ""1"") decrease chance of correct recognition by customer."
 "Reload captcha","Reload captcha"
-"Symbols Used in CAPTCHA","Symbols Used in CAPTCHA",
+"Symbols Used in CAPTCHA","Symbols Used in CAPTCHA"
 "Number of Unsuccessful Attempts to Login per IP Address","Number of Unsuccessful Attempts to Login per IP Address"