Minimize Pausable contract

contracts/interfaces/ILendingPool.sol

@@ -430,7 +430,5 @@ interface ILendingPool {
 
   function getReserves() external view returns (address[] memory);
 
-  function pause() external;
-
-  function unpause() external;
+  function setPause(bool val) external;
 }

contracts/lendingpool/LendingPool.sol

@@ -1004,16 +1004,9 @@ contract LendingPool is VersionedInitializable, PausablePool, ILendingPool {
   }
 
   /**
-   * @dev pause all the Lending Pool actions
+   * @dev pause or unpause all the Lending Pool actions and aToken transfers
    */
-  function pause() external override onlyLendingPoolConfigurator {
-    PausablePool._pause();
-  }
-
-  /**
-   * @dev unpause all the Lending Pool actions
-   */
-  function unpause() external override onlyLendingPoolConfigurator {
-    PausablePool._unpause();
+  function setPause(bool val) external override onlyLendingPoolConfigurator {
+    PausablePool._setPause(val);
   }
 }

contracts/lendingpool/LendingPoolConfigurator.sol

@@ -584,16 +584,9 @@ contract LendingPoolConfigurator is VersionedInitializable {
   }
 
   /**
-   * @dev pauses LendingPool actions
+   * @dev pauses or unpauses LendingPool actions
    **/
-  function pausePool() external onlyLendingPoolManager {
-    pool.pause();
-  }
-
-  /**
-   * @dev unpauses LendingPool actions
-   **/
-  function unpausePool() external onlyLendingPoolManager {
-    pool.unpause();
+  function setPoolPause(bool val) external onlyLendingPoolManager {
+    pool.setPause(val);
   }
 }

contracts/misc/PausablePool.sol

@@ -26,13 +26,6 @@ contract PausablePool {
 
   bool private _paused;
 
-  /**
-   * @dev Initializes the contract in unpaused state.
-   */
-  constructor() internal {
-    _paused = false;
-  }
-
   /**
    * @dev Returns true if the contract is paused, and false otherwise.
    */
@@ -53,31 +46,6 @@ contract PausablePool {
     _;
   }
 
-  /**
-   * @dev Modifier to make a function callable only when the contract is paused.
-   *
-   * Requirements:
-   *
-   * - The contract must be paused.
-   */
-  modifier whenPaused() {
-    // require(_paused, Errors.NOT_PAUSED);
-    require(_paused, '55');
-    _;
-  }
-
-  /**
-   * @dev Triggers stopped state.
-   *
-   * Requirements:
-   *
-   * - The contract must not be paused.
-   */
-  function _pause() internal virtual whenNotPaused {
-    _paused = true;
-    emit Paused();
-  }
-
   /**
    * @dev Returns to normal state.
    *
@@ -85,8 +53,12 @@ contract PausablePool {
    *
    * - The contract must be paused.
    */
-  function _unpause() internal virtual whenPaused {
-    _paused = false;
+  function _setPause(bool val) internal virtual {
+    _paused = val;
+    if (_paused) {
+      emit Paused();
+      return;
+    }
     emit Unpaused();
   }
 }