feat: move cost unit from assignment to job profile

src/Entity/Assignment.php

@@ -43,10 +43,6 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
     #[Assert\NotNull(message: 'Bitte gib die Destination an')]
     private ?Destination $destination = null;
 
-    #[ORM\Column(nullable: true)]
-    #[Assert\NotBlank(message: 'Bitte gib den Konstenträger an')]
-    private ?string $costCenter = null;
-
     #[ORM\ManyToOne]
     #[Assert\NotNull(message: 'Bitte gib das Jobprofil an')]
     private ?JobProfile $jobProfile = null;
@@ -198,18 +194,6 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
         return $this;
     }
 
-    public function getCostCenter(): ?string
-    {
-        return $this->costCenter;
-    }
-
-    public function setCostCenter(?string $costCenter): static
-    {
-        $this->costCenter = $costCenter;
-
-        return $this;
-    }
-
     public function getJobProfile(): ?JobProfile
     {
         return $this->jobProfile;