Function removePdfPasswordPadding

removePdfPasswordPadding(buffer: ByteArray): Uint8Array<ArrayBuffer>
Removes PDF standard password padding from a buffer. Searches from the end of the buffer for the padding pattern and removes it.
Parameters
- buffer: ByteArray
  The buffer with potential password padding.
Returns Uint8Array<ArrayBuffer>
The buffer with padding removed.
Example
```
const unpadded = removePdfPasswordPadding(paddedPassword)
```
- Defined in packages/pdf-lite/src/crypto/utils.ts:63