Remove unnecessary explicit title anchors and use relative links instead (#20620)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

docs/features/quantization/int8.md

@@ -1,7 +1,6 @@
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 title: INT8 W8A8
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-[](){ #int8 }
 
 vLLM supports quantizing weights and activations to INT8 for memory savings and inference acceleration.
 This quantization method is particularly useful for reducing model size while maintaining good performance.