Use pnpm.js to install pnpm

src/inputs/index.ts

@@ -5,8 +5,6 @@ import { RunInstall, parseRunInstall } from './run-install'
 export interface Inputs {
   readonly version: string
   readonly dest: string
-  readonly binDest: string
-  readonly registry: string
   readonly runInstall: RunInstall[]
 }
 
@@ -19,8 +17,6 @@ const parseInputPath = (name: string) => expandTilde(getInput(name, options))
 export const getInputs = (): Inputs => ({
   version: getInput('version', options),
   dest: parseInputPath('dest'),
-  binDest: parseInputPath('bin_dest'),
-  registry: getInput('registry', options),
   runInstall: parseRunInstall('run_install'),
 })