feat(tooltip, popover): remove ability to use falsy adjustment (#2619)

BREAKING CHANGE:
Falsy adjustment values no longer become converted to `NbAdjustment.NOOP`, pass `NbAdjustment.NOOP` instead.

Author: yggg

src/framework/theme/components/popover/popover.directive.ts

@@ -154,12 +154,6 @@ export class NbPopoverDirective implements NbDynamicOverlayController, OnChanges
     return this._adjustment;
   }
   set adjustment(value: NbAdjustment) {
-    if (!value) {
-      // @breaking-change Remove @5.0.0
-      console.warn(`Falsy values for 'nbPopoverAdjustment' are deprecated and will be removed in Nebular 5.
- Use 'noop' instead.`);
-      value = NbAdjustment.NOOP;
-    }
     this._adjustment = value;
   }
   protected _adjustment: NbAdjustment = NbAdjustment.CLOCKWISE;

src/framework/theme/components/tooltip/tooltip.directive.ts

@@ -104,12 +104,6 @@ export class NbTooltipDirective implements OnInit, OnChanges, AfterViewInit, OnD
     return this._adjustment;
   }
   set adjustment(value: NbAdjustment) {
-    if (!value) {
-      // @breaking-change Remove @5.0.0
-      console.warn(`Falsy values for 'nbPopoverAdjustment' are deprecated and will be removed in Nebular 5.
- Use 'noop' instead.`);
-      value = NbAdjustment.NOOP;
-    }
     this._adjustment = value;
   }
   protected _adjustment: NbAdjustment = NbAdjustment.CLOCKWISE;