fix: Remove IERC20Burnable and IERC20Mintable from GhoToken (#357)

src/contracts/gho/GhoToken.sol

@@ -30,14 +30,8 @@ contract GhoToken is ERC20, AccessControl, IGhoToken {
     _setupRole(DEFAULT_ADMIN_ROLE, admin);
   }
 
-  /**
-   * @notice Mints the requested amount of tokens to the account address.
-   * @dev Only facilitators with enough bucket capacity available can mint.
-   * @dev The bucket level is increased upon minting.
-   * @param account The address receiving the GHO tokens
-   * @param amount The amount to mint
-   */
-  function mint(address account, uint256 amount) external override {
+  /// @inheritdoc IGhoToken
+  function mint(address account, uint256 amount) external {
     require(amount > 0, 'INVALID_MINT_AMOUNT');
     Facilitator storage f = _facilitators[msg.sender];
 
@@ -51,13 +45,8 @@ contract GhoToken is ERC20, AccessControl, IGhoToken {
     emit FacilitatorBucketLevelUpdated(msg.sender, currentBucketLevel, newBucketLevel);
   }
 
-  /**
-   * @notice Burns the requested amount of tokens from the account address.
-   * @dev Only active facilitators (bucket level > 0) can burn.
-   * @dev The bucket level is decreased upon burning.
-   * @param amount The amount to burn
-   */
-  function burn(uint256 amount) external override {
+  /// @inheritdoc IGhoToken
+  function burn(uint256 amount) external {
     require(amount > 0, 'INVALID_BURN_AMOUNT');
 
     Facilitator storage f = _facilitators[msg.sender];

src/contracts/gho/interfaces/IGhoToken.sol

@@ -3,14 +3,12 @@ pragma solidity ^0.8.0;
 
 import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
 import {IAccessControl} from '@openzeppelin/contracts/access/IAccessControl.sol';
-import {IERC20Burnable} from './IERC20Burnable.sol';
-import {IERC20Mintable} from './IERC20Mintable.sol';
 
 /**
  * @title IGhoToken
  * @author Aave
  */
-interface IGhoToken is IERC20Burnable, IERC20Mintable, IERC20, IAccessControl {
+interface IGhoToken is IERC20, IAccessControl {
   struct Facilitator {
     uint128 bucketCapacity;
     uint128 bucketLevel;
@@ -71,6 +69,23 @@ interface IGhoToken is IERC20Burnable, IERC20Mintable, IERC20, IAccessControl {
    */
   function BUCKET_MANAGER_ROLE() external pure returns (bytes32);
 
+  /**
+   * @notice Mints the requested amount of tokens to the account address.
+   * @dev Only facilitators with enough bucket capacity available can mint.
+   * @dev The bucket level is increased upon minting.
+   * @param account The address receiving the GHO tokens
+   * @param amount The amount to mint
+   */
+  function mint(address account, uint256 amount) external;
+
+  /**
+   * @notice Burns the requested amount of tokens from the account address.
+   * @dev Only active facilitators (bucket level > 0) can burn.
+   * @dev The bucket level is decreased upon burning.
+   * @param amount The amount to burn
+   */
+  function burn(uint256 amount) external;
+
   /**
    * @notice Add the facilitator passed with the parameters to the facilitators list.
    * @dev Only accounts with `FACILITATOR_MANAGER_ROLE` role can call this function