internal/web3ext: remove deprecated method debug_seedHash (#32495)

The corresponding function was removed in #27178

Author: gzliudan

internal/web3ext/web3ext.go

@@ -217,11 +217,6 @@ web3._extend({
 			call: 'debug_setHead',
 			params: 1
 		}),
-		new web3._extend.Method({
-			name: 'seedHash',
-			call: 'debug_seedHash',
-			params: 1
-		}),
 		new web3._extend.Method({
 			name: 'dumpBlock',
 			call: 'debug_dumpBlock',