Remove VP8 non key frame code #166
Merged
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According to the WebP specification:
The VP8 bitstream in a WebP container must always represent a key frame (frame type 0).
The existing code already only supported key-frame coding; this change reorganizes the code to make that restriction explicit and removes unused non-key-frame handling paths.
Note
Turn off whitespace changes in the diff view for a clearer comparison - many lines were only re-indented.