Remove TaskFactory specification

May be able to revert this but commit for posterity

Author: vulkan101

src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/build/Microsoft.NET.Sdk.WebAssembly.Browser.targets

@@ -54,10 +54,10 @@ Copyright (c) .NET Foundation. All rights reserved.
     <DisableBuildCompression Condition="'$(WasmBuildingForNestedPublish)' == 'true'">true</DisableBuildCompression>
   </PropertyGroup>
 
-  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.GenerateWasmBootJson" AssemblyFile="$(_WebAssemblySdkTasksAssembly)" TaskFactory="TaskHostFactory" />
-  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ComputeWasmBuildAssets" AssemblyFile="$(_WebAssemblySdkTasksAssembly)" TaskFactory="TaskHostFactory" />
-  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ComputeWasmPublishAssets" AssemblyFile="$(_WebAssemblySdkTasksAssembly)" TaskFactory="TaskHostFactory" />
-  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ConvertDllsToWebCil" AssemblyFile="$(_WebAssemblySdkTasksAssembly)" TaskFactory="TaskHostFactory" />
+  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.GenerateWasmBootJson" AssemblyFile="$(_WebAssemblySdkTasksAssembly)"/>
+  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ComputeWasmBuildAssets" AssemblyFile="$(_WebAssemblySdkTasksAssembly)"/>
+  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ComputeWasmPublishAssets" AssemblyFile="$(_WebAssemblySdkTasksAssembly)"/>
+  <UsingTask TaskName="Microsoft.NET.Sdk.WebAssembly.ConvertDllsToWebCil" AssemblyFile="$(_WebAssemblySdkTasksAssembly)" />
 
   <PropertyGroup>
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
@@ -254,7 +254,7 @@ Copyright (c) .NET Foundation. All rights reserved.
       EmitSourceMap="$(_WasmEmitSourceMapBuild)"
       FingerprintAssets="$(_WasmFingerprintAssets)"
       FingerprintDotnetJs="$(_WasmFingerprintDotnetJs)"
-    >
+    >      
       <Output TaskParameter="AssetCandidates" ItemName="_BuildAssetsCandidates" />
       <Output TaskParameter="FilesToRemove" ItemName="_WasmBuildFilesToRemove" />
     </ComputeWasmBuildAssets>