refactor: remove oclif core dependency

Author: aman19K

src/commands/cm/stacks/validate-regex.ts

@@ -1,4 +1,3 @@
-import { FlagInput } from '@contentstack/cli-utilities/node_modules/@oclif/core/lib/interfaces/parser';
 import { Command } from "@contentstack/cli-command";
 import { flags } from '@contentstack/cli-utilities';
 import { inquireAlias, inquireModule } from "../../../utils/interactive";
@@ -8,7 +7,7 @@ const regexMessages = require("../../../../messages/index.json").validateRegex;
 export default class ValidateRegex extends Command {
   static description = regexMessages.command.description;
 
-  static flags: FlagInput = {
+  static flags: any = {
     help: flags.help({ char: "h", description: regexMessages.command.help }),
     alias: flags.string({
       char: "a",