chore: Remove Swagger spec from the generated HTTP client

There is no use for it in the client and it's not easy
to audit it in the contributed PRs.

Makefile

@@ -31,7 +31,7 @@ ${GEN_DIR}/%.pb.go ${GEN_DIR}/%.pb.gw.go: ${PROTO_DIR}/%.proto
 ${API_DIR}/client/${V}/api/http.go: ${PROTO_DIR}/openapi.yaml scripts/fix_openapi.sh
 	mkdir -p ${API_DIR}/client/${V}/api
 	/bin/bash scripts/fix_openapi.sh ${PROTO_DIR}/openapi.yaml /tmp/openapi.yaml
-	oapi-codegen --old-config-style -package api -generate "client, types, spec" \
+	oapi-codegen --old-config-style -package api -generate "client, types" \
 		-o ${API_DIR}/client/${V}/api/http.go \
 		/tmp/openapi.yaml