Remove apiKey deprecated config option

The `apiKey` was replaced with the `pushApiKey` config option some time
ago. Remove the deprecated config option for the next major release.

Part of #738

.changesets/remove-apikey-config-option.md

@@ -0,0 +1,6 @@
+---
+bump: "major"
+type: "remove"
+---
+
+Remove the `apiKey` config option. This has been renamed to `pushApiKey`.

src/__tests__/config.test.ts

@@ -140,22 +140,6 @@ describe("Configuration", () => {
     })
   })
 
-  describe("apiKey option", () => {
-    it("sets the pushApiKey config option with the apiKey value", () => {
-      const warnMock = jest.spyOn(console, "warn").mockImplementation(() => {})
-      const apiKey = "my key"
-      config = new Configuration({ apiKey })
-
-      expect(config.data.pushApiKey).toEqual(apiKey)
-      expect(config.data.apiKey).toBeUndefined()
-      expect(config.sources.initial.pushApiKey).toEqual(apiKey)
-      expect(config.sources.initial.apiKey).toBeUndefined()
-      expect(warnMock).toBeCalledWith(
-        "DEPRECATED: The `apiKey` config option was renamed to `pushApiKey`. Please rename the config option given to the Appsignal module."
-      )
-    })
-  })
-
   describe("logFilePath", () => {
     it("uses the default log file path", () => {
       jest.spyOn(fs, "accessSync").mockImplementation(() => {})

src/config.ts

@@ -19,13 +19,6 @@ export class Configuration {
   sources: Record<string, Partial<AppsignalOptions>>
 
   constructor(options: Partial<AppsignalOptions>) {
-    if (options.apiKey) {
-      console.warn(
-        "DEPRECATED: The `apiKey` config option was renamed to `pushApiKey`. Please rename the config option given to the Appsignal module."
-      )
-      options.pushApiKey = options.apiKey
-      delete options.apiKey
-    }
     this.sources = {
       default: this._defaultValues(),
       system: this._systemValues(),

src/config/options.ts

@@ -2,7 +2,6 @@ import type { DefaultInstrumentationName } from "../client"
 
 export type AppsignalOptions = {
   active: boolean
-  apiKey: string
   caFilePath: string
   disableDefaultInstrumentations: DefaultInstrumentationName[] | boolean
   dnsServers: string[]