Auto merge of #115309 - hermitcore:hermit-net-init, r=cuviper

fix(sys/hermit): remove obsolete network initialization

This function does not exist as of hermit-sys 0.4.1 ([`e38f246`]). Once std does not call this function, we can remove it entirely.

CC: `@stlankes`

[`e38f246`]: hermit-os/hermit-rs@e38f246#diff-a9b7fa816defab285f0d4fe69d4df4a0cbbcf1c89913000df3273aded949f257R10

Author: bors