fix: remove all Apple signing env vars to prevent signing attempts

- Completely remove Apple certificate environment variables
- Empty strings were still triggering Tauri's signing logic
- Only GITHUB_TOKEN is needed for unsigned builds
- Fixes: failed codesign application error

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: thisisharsh7

.github/workflows/build.yml

@@ -157,15 +157,6 @@ jobs:
         uses: tauri-apps/tauri-action@v0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          APPLE_ID: ${{ inputs.sign-binaries && secrets.APPLE_ID || '' }}
-          APPLE_ID_PASSWORD: ${{ inputs.sign-binaries && secrets.APPLE_ID_PASSWORD || '' }}
-          APPLE_PASSWORD: ${{ inputs.sign-binaries && secrets.APPLE_PASSWORD || '' }}
-          APPLE_TEAM_ID: ${{ inputs.sign-binaries && secrets.APPLE_TEAM_ID || '' }}
-          APPLE_CERTIFICATE: ${{ inputs.sign-binaries && secrets.APPLE_CERTIFICATE || '' }}
-          APPLE_CERTIFICATE_PASSWORD: ${{ inputs.sign-binaries && secrets.APPLE_CERTIFICATE_PASSWORD || '' }}
-          APPLE_SIGNING_IDENTITY: ${{ inputs.sign-binaries && env.CERT_ID || '' }}
-          TAURI_SIGNING_PRIVATE_KEY: ${{ inputs.sign-binaries && secrets.TAURI_SIGNING_PRIVATE_KEY || '' }}
-          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ inputs.sign-binaries && secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD || '' }}
         with:
           tagName: ${{ inputs.release-id && format('v{0}', steps.get-version.outputs.version) || '' }}
           releaseName: ${{ inputs.release-id && format('v{0}', steps.get-version.outputs.version) || '' }}