refactor(admin): drop the redundant movability assertion

classifyWorkspaceMoveState already calls assertWorkspaceMovable, so the
explicit call before it was a second guard point with identical behaviour.

Author: mzxchandra

apps/sim/lib/workspaces/admin-move.ts

@@ -865,7 +865,6 @@ export async function moveWorkspaceToOrganization(params: {
         if (workspaceRow.organizationId !== candidateSourceOrganizationId) {
           throw new SourceOrganizationChangedError(workspaceRow.organizationId)
         }
-        assertWorkspaceMovable(workspaceRow)
         const sourceOrganizationId = workspaceRow.organizationId
         const moveState = classifyWorkspaceMoveState(workspaceRow, params.destinationOrganizationId)