docs: cleanup installation docs

docs/installation.md

@@ -1,13 +1,11 @@
 # Install
 
-The Arc node binaries can be installed in two ways:
-downloading pre-built binaries via [`arcup`](#pre-built-binary),
-or by building them from [source](#build-from-source).
+The Arc node binaries can be installed by [building from source](#build-from-source).
 
 After the installation, refer to [Running an Arc Node](./running-an-arc-node.md)
 for how to run an Arc node.
 
-> **Docker:** Container images and Docker Compose instructions are coming soon.
+> **Pre-built binaries** and **Docker images** are coming soon.
 
 ## Versions
 
@@ -18,43 +16,6 @@ Consult the table below to confirm which version to run for each network.
 |-------------|---------|
 | Arc Testnet | v0.6.0  |
 
-## Pre-built Binary
-
-This repository includes `arcup`, a script that installs Arc node binaries
-into `$ARC_BIN_DIR` directory, defaulting to `~/.arc/bin`:
-
-```sh
-curl -L https://raw.githubusercontent.com/circlefin/arc-node/main/arcup/install | bash
-```
-
-More precisely, the [configured paths](./running-an-arc-node.md#configure-paths)
-for Arc nodes are based on the `$ARC_HOME` variable, with `~/.arc` as default value.
-If `$ARC_BIN_DIR` is not set, its default value is `$ARC_HOME/bin`, defaulting
-to `~/.arc/bin`.
-`$ARC_BIN_DIR` must be part of the system `PATH`.
-
-To be sure that the binaries installed under `$ARC_BIN_DIR` are available in
-the `PATH`, load the produced environment file:
-
-```sh
-source $ARC_HOME/env
-```
-
-Next, verify that the three Arc binaries are installed:
-
-```sh
-arc-snapshots --version
-arc-node-execution --version
-arc-node-consensus --version
-```
-
-The `arcup` script should also be in the `PATH`
-and can be used to update Arc binaries:
-
-```sh
-arcup
-```
-
 ## Build from Source
 
 The Arc node source code is available in the