fix: rm eics3rw mirror

mirrors.yaml.in

@@ -23,18 +23,3 @@ mirrors:
       access_pair:
       - ${GITHUB_REGISTRY_USER}
       - ${GITHUB_REGISTRY_TOKEN}
-  eics3rw:
-    autopush: false
-    signed: false
-    fetch:
-      url: s3://eictest/EPIC/spack/${SPACK_VERSION}
-      access_pair:
-      - ${S3RW_ACCESS_KEY}
-      - ${S3RW_SECRET_KEY}
-      endpoint_url: https://eics3.sdcc.bnl.gov:9000
-    push:
-      url: s3://eictest/EPIC/spack/${SPACK_VERSION}
-      access_pair:
-      - ${S3RW_ACCESS_KEY}
-      - ${S3RW_SECRET_KEY}
-      endpoint_url: https://eics3.sdcc.bnl.gov:9000