Remove all prod eth1 related code (#7133)

Squashed commit of the following:

commit e3c7251
Merge: 7a94542 6135f41
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jun 16 16:38:41 2025 +1000

    Merge remote-tracking branch 'origin/unstable' into remove-eth1

commit 7a94542
Merge: 373062d 38a5f33
Author: Pawan Dhananjay <pawandhananjay@gmail.com>
Date:   Fri May 30 10:18:02 2025 -0700

    Merge branch 'unstable' into remove-eth1

commit 373062d
Author: Pawan Dhananjay <pawandhananjay@gmail.com>
Date:   Mon May 12 15:19:12 2025 -0700

    Remove all eth1 related prod code

Author: michaelsproul

Cargo.lock

@@ -6,7 +6,6 @@ members = [
     "beacon_node/beacon_processor",
     "beacon_node/builder_client",
     "beacon_node/client",
-    "beacon_node/eth1",
     "beacon_node/execution_layer",
     "beacon_node/genesis",
     "beacon_node/http_api",
@@ -72,7 +71,6 @@ members = [
     "slasher",
     "slasher/service",
     "testing/ef_tests",
-    "testing/eth1_test_rig",
     "testing/execution_engine_integration",
     "testing/node_test_rig",
     "testing/simulator",
@@ -138,8 +136,6 @@ doppelganger_service = { path = "validator_client/doppelganger_service" }
 either = "1.9"
 env_logger = "0.9"
 environment = { path = "lighthouse/environment" }
-eth1 = { path = "beacon_node/eth1" }
-eth1_test_rig = { path = "testing/eth1_test_rig" }
 eth2 = { path = "common/eth2" }
 eth2_config = { path = "common/eth2_config" }
 eth2_key_derivation = { path = "crypto/eth2_key_derivation" }

Cargo.toml

@@ -19,7 +19,6 @@ alloy-primitives = { workspace = true }
 bitvec = { workspace = true }
 bls = { workspace = true }
 derivative = { workspace = true }
-eth1 = { workspace = true }
 eth2 = { workspace = true }
 eth2_network_config = { workspace = true }
 ethereum_hashing = { workspace = true }