Remove unnecessary workload installations in build script

Removed installation of wasm-tools and maui-tizen workloads.

Author: maliming

build/build-all.ps1

@@ -6,9 +6,6 @@ $full = $args[0]
 
 Write-Host $solutionPaths
 
-dotnet workload install wasm-tools
-dotnet workload install maui-tizen
-
 foreach ($solutionPath in $solutionPaths) {    
     $solutionAbsPath = (Join-Path $rootFolder $solutionPath)
     Set-Location $solutionAbsPath