Revert "RTBHouse: native support (#3212)"

[bsardo]

This reverts commit 2540dd8.

[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, 24ce6e2

rtbhouse

Refer here for heat map coverage report

github.com/prebid/prebid-server/v2/adapters/rtbhouse/rtbhouse.go:26:	Builder			100.0%
github.com/prebid/prebid-server/v2/adapters/rtbhouse/rtbhouse.go:34:	MakeRequests		84.4%
github.com/prebid/prebid-server/v2/adapters/rtbhouse/rtbhouse.go:101:	getImpressionExt	71.4%
github.com/prebid/prebid-server/v2/adapters/rtbhouse/rtbhouse.go:123:	MakeBids		100.0%
total:									(statements)		88.5%

[piotrj-rtbh]

Hey @bsardo , is there any timeline to restore this PR back into master?