docs: remove duplicate title

Author: hacdias

src/http-gateways/path-gateway.md

@@ -24,8 +24,6 @@ tags: ['httpGateways', 'lowLevelHttpGateways']
 order: 0
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-# Path Gateway Specification
-
 The most versatile form of IPFS Gateway is a Path Gateway.
 
 It exposes namespaces like  `/ipfs/` and `/ipns/`  under HTTP server root and