Remove unreliable seed from chainparams.cpp, and the associated README

contrib/seeds/README.md

@@ -10,14 +10,13 @@ to addrman with).
 
 Update `MIN_BLOCKS` in  `makeseeds.py` and the `-m`/`--minblocks` arguments below, as needed.
 
-The seeds compiled into the release are created from sipa's, achow101's and luke-jr's
+The seeds compiled into the release are created from sipa's and achow101's
 DNS seed, virtu's crawler, and asmap community AS map data. Run the following commands
 from the `/contrib/seeds` directory:
 
 ```
 curl https://bitcoin.sipa.be/seeds.txt.gz | gzip -dc > seeds_main.txt
 curl https://21.ninja/seeds.txt.gz | gzip -dc >> seeds_main.txt
-curl https://luke.dashjr.org/programs/bitcoin/files/charts/seeds.txt >> seeds_main.txt
 curl https://mainnet.achownodes.xyz/seeds.txt.gz | gzip -dc >> seeds_main.txt
 curl https://signet.achownodes.xyz/seeds.txt.gz | gzip -dc > seeds_signet.txt
 curl https://testnet.achownodes.xyz/seeds.txt.gz | gzip -dc > seeds_test.txt