RFR: 8293064: Remove unused NET_xxx functions [v2]

[Aleksei Efimov]

On Wed, 21 Sep 2022 14:01:00 GMT, Darragh Clarke <duke at openjdk.org> wrote:

>> No tests were affected so this is purely a removal PR apart from updating copyright headers.
>> I ran tests for Tier 1,2&3 and everything seems to be passing
>
> Darragh Clarke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   removed more functions

Thanks for cleaning up additional methods, Darragh. 

The following `NET_` methods were removed and no longer referenced from the native code:
`NET_BindV6` `NET_Dup2` `NET_GetFileDescriptorID` `NET_NonBlockingRead` `NET_Read` `NET_RecvFrom` `NET_Send` `NET_SendTo` `NET_SetTrafficClass` `NET_SocketClose` `NET_ThrowCurrent` `NET_ThrowNew` `NET_Timeout` `NET_Timeout2`.

That is a great cleanup 👍

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Marked as reviewed by aefimov (Committer).

PR: https://git.openjdk.org/jdk/pull/10343