Removed fuzzy that was left by mistake. (#462)

Author: Seluj78

using/mac.po

@@ -312,7 +312,6 @@ msgstr ""
 "pyobjc/."
 
 #: ../Doc/using/mac.rst:146
-#, fuzzy
 msgid ""
 "The standard Python GUI toolkit is :mod:`tkinter`, based on the cross-"
 "platform Tk toolkit (https://www.tcl.tk). An Aqua-native version of Tk is "