remove work-around for Mac OS version extraction

[kares]

a work-around was introduced with the 0.12.0 UA regexes update at: #69

the issue is tracked upstream as: ua-parser/uap-core#504
when resolved the plugin should update regexes.yaml and skip patching the file:

logstash-filter-useragent/build.gradle

Lines 66 to 69 in 3d7221e

	// work-around a 'regression' with extracting Mac OS version, without the '?'
	// the pattern would extract major: '18', minor: '2' from agent strings like:
	// "MacOutlook/16.24.0.190414 (Intelx64 Mac OS X Version 10.14.4 (Build 18E226))"
	line.replace("- regex: 'Mac OS X\\s.{1,50}\\s(\\d+).(\\d+).(\\d+)'", "- regex: 'Mac OS X\\s.{1,50}?\\s(\\d+).(\\d+).(\\d+)'")