all: remove noop vm config flags (#23111)

* all: rm external interpreter and ewasm config

* core/vm: rm Interpreter interface

* cmd/geth: deprecate interpreter config fields

tests/init_test.go

@@ -18,7 +18,6 @@ package tests
 
 import (
 	"encoding/json"
-	"flag"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -34,17 +33,6 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 )
 
-// Command line flags to configure the interpreters.
-var (
-	testEVM   = flag.String("vm.evm", "", "EVM configuration")
-	testEWASM = flag.String("vm.ewasm", "", "EWASM configuration")
-)
-
-func TestMain(m *testing.M) {
-	flag.Parse()
-	os.Exit(m.Run())
-}
-
 var (
 	baseDir            = filepath.Join(".", "testdata")
 	blockTestDir       = filepath.Join(baseDir, "BlockchainTests")