plugins: Remove ignore for removed pylint checker

Command line:1:0: R0022: Useless option value for '-d', 'C0326' was removed from pylint, see pylint-dev/pylint#3577. (useless-option-value)

src/plugins/meson.build

@@ -67,7 +67,7 @@ if plugins_option != 'none'
   endif
 endif
 
-pylint_flags = ['-d', 'C0111', '-d', 'W0511', '-d', 'F0401', '-d', 'C0326' ]
+pylint_flags = ['-d', 'C0111', '-d', 'W0511', '-d', 'F0401' ]
 
 foreach plugin: plugins
   subdir(plugin)