refactor: keep noninteractive install configuration environment-only

scripts/install/install.ps1

@@ -1,6 +1,6 @@
+[CmdletBinding()]
 param(
-    [string]$Release = $env:CODEX_RELEASE,
-    [switch]$NonInteractive
+    [string]$Release = $env:CODEX_RELEASE
 )
 
 Set-StrictMode -Version Latest
@@ -11,9 +11,7 @@ if ([string]::IsNullOrWhiteSpace($Release)) {
     $Release = "latest"
 }
 
-if (-not $PSBoundParameters.ContainsKey("NonInteractive") -and $env:CODEX_NON_INTERACTIVE -match "^(?i:1|true|yes)$") {
-    $NonInteractive = $true
-}
+$NonInteractive = $env:CODEX_NON_INTERACTIVE -match "^(?i:1|true|yes)$"
 
 function Write-Step {
     param(

scripts/install/install.sh

@@ -58,12 +58,9 @@ parse_args() {
         RELEASE="$2"
         shift
         ;;
-      --non-interactive)
-        NON_INTERACTIVE=true
-        ;;
       --help | -h)
         cat <<EOF
-Usage: install.sh [--release VERSION] [--non-interactive]
+Usage: install.sh [--release VERSION]
 
 Environment:
   CODEX_RELEASE          Version to install; overridden by --release.