Remove unused periodIndex parameter from getMainAdaptationForType type definition and JSDoc (Dash-Industry-Forum#4826)

Author: steve-taylor

index.d.ts

@@ -1044,7 +1044,7 @@ declare namespace dashjs {
 
         areMediaInfosEqual(mInfoOne: MediaInfo, mInfoTwo: MediaInfo): boolean;
 
-        getMainAdaptationForType(periodIndex: number, type: MediaType, streamInfo: object): IAdaptation | null;
+        getMainAdaptationForType(type: MediaType, streamInfo: object): IAdaptation | null;
 
         getAllMediaInfoForType(streamInfo: object, type: MediaType, externalManifest?: object | null): any[];
 

src/dash/DashAdapter.js

@@ -132,7 +132,6 @@ function DashAdapter() {
 
     /**
      * Returns the AdaptationSet for a given period index and a given mediaType.
-     * @param {number} periodIndex
      * @param {MediaType} type
      * @param {object} streamInfo
      * @returns {null|object} adaptation