Remove unused context providers (#48267)

These were added early on based on some assumptions around how the
params would be passed. In the actual implementation it works
differently so these are just dead code.

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packages/next/src/client/components/app-router.tsx

@@ -30,9 +30,7 @@ import {
 import { createHrefFromUrl } from './router-reducer/create-href-from-url'
 import {
   SearchParamsContext,
-  // ParamsContext,
   PathnameContext,
-  // LayoutSegmentsContext,
 } from '../../shared/lib/hooks-client-context'
 import { useReducerWithReduxDevtools } from './use-reducer-with-devtools'
 import { ErrorBoundary } from './error-boundary'

packages/next/src/client/components/navigation.ts

@@ -9,9 +9,7 @@ import {
 } from '../../shared/lib/app-router-context'
 import {
   SearchParamsContext,
-  // ParamsContext,
   PathnameContext,
-  // LayoutSegmentsContext,
 } from '../../shared/lib/hooks-client-context'
 import { clientHookInServerComponentError } from './client-hook-in-server-component-error'
 import { getSegmentValue } from './router-reducer/reducers/get-segment-value'

packages/next/src/shared/lib/hooks-client-context.ts

@@ -4,12 +4,8 @@ import { createContext } from 'react'
 
 export const SearchParamsContext = createContext<URLSearchParams | null>(null)
 export const PathnameContext = createContext<string | null>(null)
-export const ParamsContext = createContext(null as any)
-export const LayoutSegmentsContext = createContext(null as any)
 
 if (process.env.NODE_ENV !== 'production') {
   SearchParamsContext.displayName = 'SearchParamsContext'
   PathnameContext.displayName = 'PathnameContext'
-  ParamsContext.displayName = 'ParamsContext'
-  LayoutSegmentsContext.displayName = 'LayoutSegmentsContext'
 }