Removed the redundant "Load mode" dropdown from both whisper-server forms
(builder + edit modal). A whisper-server is backed by a GGUF model, so its
load mode now derives from that GGUF's configured load_mode (default
on-request) instead of being set separately in two places. Load/offload
strategy stays solely in the GGUF model config.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>