Remove workaround for setOutput

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/context.ts

@@ -1,5 +1,4 @@
 import * as core from '@actions/core';
-import {issueCommand} from '@actions/core/lib/command';
 
 export interface Inputs {
   image: string;
@@ -12,8 +11,3 @@ export function getInputs(): Inputs {
     platforms: core.getInput('platforms') || 'all'
   };
 }
-
-// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
-export function setOutput(name: string, value: unknown): void {
-  issueCommand('set-output', {name}, value);
-}