Bump to more recent go version, remove no longer required overrides

[SuperSandro2000]

This fixes the following error when building in nixpkgs

dive> vendor/golang.org/x/sys/unix/syscall.go:83:16: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)
dive> vendor/golang.org/x/sys/unix/syscall_linux.go:1018:20: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)
dive> vendor/golang.org/x/sys/unix/syscall_linux.go:2308:9: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)
dive> vendor/golang.org/x/sys/unix/syscall_unix.go:118:7: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)
dive> vendor/golang.org/x/sys/unix/sysvshm_unix.go:33:7: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)

[wagoodman]

good call! I meant to clean this up on the latest rework 🙌