Cleanup redundant type parameters

types/react-native/index.d.ts

@@ -5322,8 +5322,8 @@ export interface SystraceStatic {
 export interface DataSourceAssetCallback {
     rowHasChanged?: (r1: any, r2: any) => boolean
     sectionHeaderHasChanged?: (h1: any, h2: any) => boolean
-    getRowData?: <T>(dataBlob: any, sectionID: number | string, rowID: number | string) => T
-    getSectionHeaderData?: <T>(dataBlob: any, sectionID: number | string) => T
+    getRowData?: (dataBlob: any, sectionID: number | string, rowID: number | string) => any
+    getSectionHeaderData?: (dataBlob: any, sectionID: number | string) => any
 }
 
 /**
@@ -5383,7 +5383,7 @@ export interface ListViewDataSource {
      * handle merging of old and new data separately and then pass that into
      * this function as the `dataBlob`.
      */
-    cloneWithRows<T>(dataBlob: Array<any> | { [key: string]: any }, rowIdentities?: Array<string | number>): ListViewDataSource
+    cloneWithRows(dataBlob: Array<any> | { [key: string]: any }, rowIdentities?: Array<string | number>): ListViewDataSource
 
     /**
      * This performs the same function as the `cloneWithRows` function but here
@@ -5631,7 +5631,7 @@ interface PlatformStatic {
 interface DeviceEventEmitterStatic extends EventEmitter {
     sharedSubscriber: EventSubscriptionVendor
     new(): DeviceEventEmitterStatic;
-    addListener<T>( type: string, listener: ( data: T ) => void, context?: any ): EmitterSubscription;
+    addListener( type: string, listener: ( data: any ) => void, context?: any ): EmitterSubscription;
 }
 
 // Used by Dimensions below

types/react-native/test/index.tsx

@@ -18,6 +18,8 @@ import {
     AppStateIOS,
     BackAndroid,
     Button,
+    DataSourceAssetCallback,
+    DeviceEventEmitterStatic,
     Dimensions,
     InteractionManager,
     ListView,
@@ -369,3 +371,18 @@ class MaskedViewTest extends React.Component {
         )
     }
 }
+
+// DataSourceAssetCallback
+const dataSourceAssetCallback1: DataSourceAssetCallback = {
+    rowHasChanged: (r1, r2) => true,
+    sectionHeaderHasChanged: (h1, h2) => true,
+    getRowData: (dataBlob, sectionID, rowID) => (sectionID as number) + (rowID as number),
+    getSectionHeaderData: (dataBlob, sectionID) => sectionID as string,
+}
+
+const dataSourceAssetCallback2: DataSourceAssetCallback = {}
+
+// DeviceEventEmitterStatic
+const deviceEventEmitterStatic: DeviceEventEmitterStatic = null;
+deviceEventEmitterStatic.addListener('keyboardWillShow', (data) => true);
+deviceEventEmitterStatic.addListener('keyboardWillShow', (data) => true, {});