core/state, trie: remove unused error-return from trie Commit operation (#26641)

tests/fuzzers/stacktrie/trie_fuzzer.go

@@ -182,10 +182,7 @@ func (f *fuzzer) fuzz() int {
 		return 0
 	}
 	// Flush trie -> database
-	rootA, nodes, err := trieA.Commit(false)
-	if err != nil {
-		panic(err)
-	}
+	rootA, nodes := trieA.Commit(false)
 	if nodes != nil {
 		dbA.Update(trie.NewWithNodeSet(nodes))
 	}
@@ -201,9 +198,7 @@ func (f *fuzzer) fuzz() int {
 		trieB.Update(kv.k, kv.v)
 	}
 	rootB := trieB.Hash()
-	if _, err := trieB.Commit(); err != nil {
-		panic(err)
-	}
+	trieB.Commit()
 	if rootA != rootB {
 		panic(fmt.Sprintf("roots differ: (trie) %x != %x (stacktrie)", rootA, rootB))
 	}

tests/fuzzers/trie/trie-fuzzer.go

@@ -161,10 +161,7 @@ func runRandTest(rt randTest) error {
 		case opHash:
 			tr.Hash()
 		case opCommit:
-			hash, nodes, err := tr.Commit(false)
-			if err != nil {
-				return err
-			}
+			hash, nodes := tr.Commit(false)
 			if nodes != nil {
 				if err := triedb.Update(trie.NewWithNodeSet(nodes)); err != nil {
 					return err