Revert "Rubicon: Update segtax logic (#3915)"

[bsardo]

This reverts commit 6e3a0d5.

This is the second of two Rubicon segtax related reverts.

The segtax behavior is unpredictable and is suspected to be attributed to the use of an unmaintained library that was introduced as part of this effort.

[github-actions]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors
• Coverage summary encompasses all commits leading up to the latest one, cd04a0c

rubicon

Refer here for heat map coverage report

github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:176:	appendTrackerToUrl			87.5%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:192:	Builder					100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:204:	updateRequestTo26			92.3%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:229:	MakeRequests				80.6%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:541:	createImpsToExtMap			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:560:	prepareImpsToExtMap			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:579:	splitMultiFormatImp			61.5%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:616:	resolveBidFloor				100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:624:	updateImpRpTarget			77.8%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:711:	extractDfpAdUnitCode			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:721:	isNotKeyPathError			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:725:	addStringAttribute			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:729:	addStringArrayAttribute			0.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:733:	updateUserRpTargetWithFpdAttributes	70.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:763:	updateExtWithIabAttribute		100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:772:	populateFirstPartyDataAttributes	92.9%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:800:	isStringArray				100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:810:	isBoolArray				100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:820:	convertToStringArray			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:831:	rawJSONToMap				100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:839:	mapFromRawJSON				80.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:848:	getSegmentIdsToCopy			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:868:	contains				75.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:877:	isVideo					100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:886:	isFullyPopulatedVideo			100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:891:	resolveNativeObject			88.2%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:923:	setImpNative				82.4%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:952:	MakeBids				92.2%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:1052:	mapImpIdToCpmOverride			90.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:1070:	resolveAdm				87.5%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:1085:	cmpOverrideFromBidRequest		100.0%
github.com/prebid/prebid-server/v3/adapters/rubicon/rubicon.go:1094:	updateBidExtWithMetaNetworkId		82.4%
total:									(statements)				84.0%

[hhhjort]

LGTM