Retire ConstantDerivation

packages/dataverse/src/derivations/ConstantDerivation.ts

@@ -1,29 +0,0 @@
-import AbstractDerivation from './AbstractDerivation'
-
-/**
- * A derivation whose value never changes.
- */
-export default class ConstantDerivation<V> extends AbstractDerivation<V> {
-  private readonly _v: V
-
-  /**
-   * @param v - The value of the derivation.
-   */
-  constructor(v: V) {
-    super()
-    this._v = v
-    return this
-  }
-
-  /**
-   * @internal
-   */
-  _recalculate() {
-    return this._v
-  }
-
-  /**
-   * @internal
-   */
-  _reactToDependencyBecomingStale() {}
-}

packages/dataverse/src/index.ts

@@ -9,7 +9,6 @@ export {default as Atom, val, valueDerivation} from './Atom'
 export {default as Box} from './Box'
 export type {IBox} from './Box'
 export {default as AbstractDerivation} from './derivations/AbstractDerivation'
-export {default as ConstantDerivation} from './derivations/ConstantDerivation'
 export {default as DerivationFromSource} from './derivations/DerivationFromSource'
 export {isDerivation} from './derivations/IDerivation'
 export type {IDerivation} from './derivations/IDerivation'