Deprecate OpaqueToPointers for now

https://github.com/theatre-js/theatre/pull/118#discussion_r846628039

packages/dataverse/src/index.ts

@@ -17,6 +17,6 @@ export {default as iterateAndCountTicks} from './derivations/iterateAndCountTick
 export {default as iterateOver} from './derivations/iterateOver'
 export {default as prism} from './derivations/prism/prism'
 export {default as pointer, getPointerParts, isPointer} from './pointer'
-export type {Pointer, PointerType, OpaqueToPointers} from './pointer'
+export type {Pointer, PointerType} from './pointer'
 export {default as Ticker} from './Ticker'
 export {default as PointerProxy} from './PointerProxy'

packages/dataverse/src/pointer.ts

@@ -7,10 +7,6 @@ type PointerMeta = {
   path: (string | number)[]
 }
 
-const symbolForUnpointableTypes = Symbol()
-
-export type OpaqueToPointers = {[symbolForUnpointableTypes]: true}
-
 export type UnindexableTypesForPointer =
   | number
   | string
@@ -19,7 +15,6 @@ export type UnindexableTypesForPointer =
   | void
   | undefined
   | Function // eslint-disable-line @typescript-eslint/ban-types
-  | OpaqueToPointers
 
 export type UnindexablePointer = {
   [K in $IntentionalAny]: Pointer<undefined>