Update action.yml

Author: nathancolgate

action.yml

@@ -16,13 +16,10 @@ inputs:
     description: Tag regex to exclude. Example - ^(latest|tag1|tag2)$
     required: false
     default: ''
-  perform_gc: 
-    description: 'Boolean to Perform Garbage collection'
-    required: false
 
 runs:
   using: composite
   steps:
     - name: Remove images older than the last n versions
       shell: bash
-      run: ${{ github.action_path }}/remove_images.sh ${{ inputs.image_repository }} ${{ inputs.buffer_size }} ${{ inputs.perform_gc }} '${{ inputs.exclude }}'
+      run: ${{ github.action_path }}/remove_images.sh ${{ inputs.image_repository }} ${{ inputs.buffer_size }} '${{ inputs.exclude }}'