chore: lint fixes (#24084)

codec/amino_codec_test.go

@@ -71,7 +71,6 @@ func TestAminoCodecMarshalJSONIndent(t *testing.T) {
 	}
 
 	for _, tc := range testCases {
-		tc := tc
 
 		t.Run(tc.name, func(t *testing.T) {
 			cdc := codec.NewAminoCodec(createTestCodec())

codec/codec_common_test.go

@@ -121,7 +121,6 @@ func testMarshaling(t *testing.T, cdc interface {
 	}
 
 	for _, tc := range testCases {
-		tc := tc
 		m1 := mustMarshaler{cdc.Marshal, cdc.MustMarshal, cdc.Unmarshal, cdc.MustUnmarshal}
 		m2 := mustMarshaler{cdc.MarshalLengthPrefixed, cdc.MustMarshalLengthPrefixed, cdc.UnmarshalLengthPrefixed, cdc.MustUnmarshalLengthPrefixed}
 		m3 := mustMarshaler{