Revert "added validation for if ORIGIN_TAG=null"

.github/actions/tag-action/action.yaml

@@ -17,14 +17,7 @@ runs:
   using: "composite"
   steps:
     - run: |
-        if [[ -z "${{ inputs.ORIGINAL_TAG }}" ]]; then
-          echo "The value of ORIGINAL_TAG is ${{ inputs.ORIGINAL_TAG }}"
-          echo "Setting the value of ORIGINAL_TAG to ${{ github.ref_name }}"
-          export ORIGINAL_TAG=${{ github.ref_name }}
-        fi
-      shell: bash
-
-    - run: |
+        SUB='-rc'
         if [[ "${{ inputs.ORIGINAL_TAG }}" == *"${{ inputs.SUB_STRING }}"* ]]; then
             echo "Release candidate tag found."
         else