remove obsolete test for BlazorWebAssemblyStartupMemoryCache

Author: pavelsavara

test/Microsoft.NET.Sdk.BlazorWebAssembly.Tests/WasmBuildIntegrationTest.cs

@@ -760,13 +760,6 @@ public class TestReference
             fileInWwwroot.Should().Exist();
         }
 
-        [RequiresMSBuildVersionTheory("17.12", Reason = "Needs System.Text.Json 8.0.5")]
-        [InlineData(true)]
-        [InlineData(false)]
-        [InlineData(null)]
-        public void Build_WithStartupMemoryCache(bool? value)
-            => BuildWasmMinimalAndValidateBootConfig(new[] { ("BlazorWebAssemblyStartupMemoryCache", value?.ToString()) }, b => b.startupMemoryCache.Should().Be(value));
-
         [RequiresMSBuildVersionTheory("17.12", Reason = "Needs System.Text.Json 8.0.5")]
         [InlineData(true)]
         [InlineData(false)]