Drop internal/common/distro.go in favor of osbuild/images

Drop `common.GetHostDistroName()` implementation and use
`distro.GetHostDistroName()` from the osbuild/images instead.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

internal/weldr/api.go

@@ -161,7 +161,7 @@ func New(repoPaths []string, stateDir string, solver *dnfjson.BaseSolver, df *di
 		logger = log.New(os.Stdout, "", 0)
 	}
 
-	hostDistroName, _, _, err := common.GetHostDistroName()
+	hostDistroName, err := distro.GetHostDistroName()
 	if err != nil {
 		return nil, fmt.Errorf("failed to read host distro information")
 	}