`--log-as-json` should not be present as a flag under `dapr list`

## Expected Behavior

When running `dapr list --log-as-json`, I expect the output to be in JSON format.

## Actual Behavior

The output is in the default table format.

## Steps to Reproduce the Problem

```bash
% dapr --version
CLI version: 1.2.0-rc.2
Runtime version: 1.2.0-rc.3

% dapr list --help
List all Dapr instances. Supported platforms: Kubernetes and self-hosted

Usage:
dapr list [flags]

Examples:

# List Dapr instances in self-hosted mode
dapr list

# List Dapr instances in Kubernetes mode
dapr list -k

Flags:
-h, --help Print this help message
-k, --kubernetes List all Dapr pods in a Kubernetes cluster

Global Flags:
--log-as-json Log output in JSON format

% dapr list --log-as-json
APP ID HTTP PORT GRPC PORT APP PORT COMMAND AGE CREATED PID
Ninjabronze-Reaper 54536 54537 0 4m 2021-05-25 10:36.29 28261
```