Remove redundant method implementation

sources/src/dependency-graph.ts

@@ -14,6 +14,7 @@ import {PostActionJobFailure} from './errors'
 import {
     DependencyGraphOption,
     getDependencyGraphContinueOnFailure,
+    getGithubToken,
     getJobMatrix,
     getArtifactRetentionDays
 } from './input-params'
@@ -192,10 +193,6 @@ function getOctokit(): InstanceType<typeof GitHub> {
     return github.getOctokit(getGithubToken())
 }
 
-function getGithubToken(): string {
-    return core.getInput('github-token', {required: true})
-}
-
 function getRelativePathFromWorkspace(file: string): string {
     const workspaceDirectory = layout.workspaceDirectory()
     return path.relative(workspaceDirectory, file)