Remove ic-admin and sns from scripts/setup (#5425)

# Motivation

One of the first things people do when developing on nns-dapp is running
`scripts/setup`.
This installs (among other things) `ic-admin` and `sns`.
But you need to set `IC_COMMIT` to be able to do this, and there is no
good way in the nns-dapp repo to get it.
The `bin/dfx-sns-demo-install` in `snsdemo` also [installs these
tools](https://github.com/dfinity/snsdemo/blob/fdaf0fb392a88880c93a589f096957680acac523/bin/dfx-sns-demo-install#L29)
and has the `IC_COMMIT` [configured in the
repo](https://github.com/dfinity/snsdemo/blob/fdaf0fb392a88880c93a589f096957680acac523/bin/versions.bash#L5)
and [updated
periodically](https://github.com/dfinity/snsdemo/blob/main/.github/workflows/update-ic.yml).
So let's just remove `ic-admin` and `sns` from `scripts/setup`.

# Changes

Removed installing `ic-admin` and `sns` from `scripts/setup`.

# Tests

Manually ran `scripts/setup` and checked that it no longer tries to
install (or checks presence of) `ic-admin` and `sns`.

# Todos

- [ ] Add entry to changelog (if necessary).
not necessary

scripts/setup

@@ -222,19 +222,6 @@ install_cmake_linux() {
   sudo apt-get install cmake
 }
 
-# Note: There is an open ticket to factor out all definitions of IC_ADMIN.
-install_ic_admin_linux() {
-  curl "https://download.dfinity.systems/ic/${IC_COMMIT}/release/ic-admin.gz" | gunzip >"$USER_BIN/ic-admin"
-  chmod +x "$USER_BIN/ic-admin"
-}
-install_ic_admin_darwin() {
-  curl "https://download.dfinity.systems/ic/${IC_COMMIT}/openssl-static-binaries/x86_64-darwin/ic-admin.gz" | gunzip >"$USER_BIN/ic-admin"
-  chmod +x "$USER_BIN/ic-admin"
-  # shellcheck disable=SC2016
-  command -v ic-admin ||
-    append_to_profile "export PATH=\"\$PATH:${USER_BIN}\""
-}
-
 check_ic_wasm() {
   EXPECTED_IC_WASM_VERSION="$(jq -r '.defaults.build.config.IC_WASM_VERSION' dfx.json)"
   INSTALLED_IC_WASM_VERSION="$(ic-wasm --version | awk '{print $2}')"
@@ -255,18 +242,6 @@ install_cargo_sort() {
   cargo binstall --force --no-confirm "cargo-sort@${CARGO_SORT_VERSION}"
 }
 
-install_sns_linux() {
-  curl "https://download.dfinity.systems/ic/${IC_COMMIT}/release/sns.gz" | gunzip >"$USER_BIN/sns"
-  chmod +x "$USER_BIN/sns"
-}
-install_sns_darwin() {
-  curl "https://download.dfinity.systems/ic/${IC_COMMIT}/openssl-static-binaries/x86_64-darwin/sns.gz" | gunzip >"$USER_BIN/sns"
-  chmod +x "$USER_BIN/sns"
-  # shellcheck disable=SC2016
-  command -v sns ||
-    append_to_profile "export PATH=\"\$PATH:${USER_BIN}\""
-}
-
 install_idl2json() {
   (
     set -euo pipefail # These are not inherited in a subsell.
@@ -336,8 +311,6 @@ command -v xz || "install_xz_$OS"
 have_correct_dfx || install_dfx
 command -v gtar || tar --help | grep GNU >/dev/null || "install_tar_$OS"
 command -v cmake || "install_cmake_$OS"
-command -V ic-admin || "install_ic_admin_$OS"
-command -v sns || "install_sns_$OS"
 command -v idl2json || install_idl2json
 command -v didc || "install_didc_$OS"
 command -v pocket-ic || "install_pocketic_$OS"