runtime: delete unused function dumpbvtypes
runtime: delete unused function dumpbvtypes

The function dumpbvtypes has no use case anymore, so we remove it with
this change.

Change-Id: I1e0323542be2bcc683b75dffde76b222e087c285
Reviewed-on: https://go-review.googlesource.com/66370
Reviewed-by: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>
Run-TryBot: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

codestation/go,CAFxX/go,polyverse-security/go,golang/go,nawawi/go,Cofyc/go,cloudflare/go,codestation/go,nawawi/go,akutz/go,golang/go,CAFxX/go,golang/go,Cofyc/go,josharian/go,CAFxX/go,CAFxX/go,josharian/go,Cofyc/go,Cofyc/go,josharian/go,polyverse-security/go,nawawi/go,nawawi/go,codestation/go,polyverse-security/go,codestation/go,nawawi/go,akutz/go,polyverse-security/go,akutz/go,golang/go,golang/go,cloudflare/go,CAFxX/go,cloudflare/go,Cofyc/go,golang/go,josharian/go,josharian/go,akutz/go,polyverse-security/go,codestation/go,nawawi/go,CAFxX/go,polyverse-security/go,codestation/go,cloudflare/go,josharian/go,josharian/go,akutz/go,Cofyc/go,nawawi/go,codestation/go,nawawi/go,akutz/go,cloudflare/go,christopher-henderson/Go,golang/go,CAFxX/go,Cofyc/go,polyverse-security/go,josharian/go,cloudflare/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,codestation/go,Cofyc/go,akutz/go,polyverse-security/go,akutz/go