Fix .swift-version unused when swift-version option unset

Author: sidepelican

action.yml

@@ -5,9 +5,7 @@ branding:
   icon: download
 inputs:
   swift-version:
-    description: 'Swift version to configure (default: wasm-5.7.1-RELEASE)'
-    required: true
-    default: 'wasm-5.7.1-RELEASE'
+    description: 'Swift version to configure. Reads from .swift-version if unset.'
 runs:
   using: 'node16'
   main: 'dist/index.js'

index.js

@@ -44,8 +44,8 @@ async function installToolchain(url, version, platform) {
   return cachedPath;
 }
 
-function resolveVersionInput(options = {}) {
-  const version = core.getInput('swift-version') || options.version;
+function resolveVersionInput() {
+  const version = core.getInput('swift-version');
   if (version) {
     core.debug(`Using version from input: ${version}`);
     return version;