Drop redundant, broken trufflehog job from secret-scanner (#121)

The hand-rolled `trufflehog` job was both unpinned (`@main`, failing the
Workflow security linter) and passed `--fail` on top of the action's own
`--fail` (failing with "flag 'fail' cannot be repeated"). The reusable
`scan` job (hyperpolymath/standards secret-scanner-reusable, SHA-pinned)
already runs trufflehog — the passing `scan / trufflehog` check — so the
local job was pure duplication. Remove it: fixes both red checks and
de-duplicates secret scanning.


Claude-Session: https://claude.ai/code/session_019i2e5ABGBKQmMdqk8puFWx

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/secret-scanner.yml

@@ -13,13 +13,3 @@ jobs:
   scan:
     uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@3e4bd4c93911750727e2e4c66dff859e00079da0
     secrets: inherit
-  trufflehog:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: TruffleHog Secret Scan
-        uses: trufflesecurity/trufflehog@main
-        with:
-          extra_args: --only-verified --fail