Remove 'Clear Path' button and translation keys

Deleted the 'Clear Path' button from the pathfinding component and removed its associated translation entries from both English and German i18n files.

src/app/pages/algorithms/pathfinding/pathfinding.component.html

@@ -14,7 +14,6 @@
       <button mat-raised-button color="accent" (click)="visualizeAStar()">{{ 'PATHFINDING.ASTAR' | translate }}</button>
       <button mat-raised-button color="warn" (click)="resetBoard()">{{ 'PATHFINDING.RESET_BOARD' | translate }}</button>
       <button mat-raised-button color="warn" (click)="clearBoard()">{{ 'PATHFINDING.CLEAR_BOARD' | translate }}</button>
-      <button mat-raised-button color="info" (click)="clearPath()">{{ 'PATHFINDING.CLEAR_PATH' | translate }}</button>
     </div>
 
     <div class="legend">