Remove redundant test classes

Author: JunTaoLuo

test/Microsoft.AspNetCore.ResponseCaching.Tests/ResponseCachingContextTests.cs

@@ -125,17 +125,12 @@ public void RequestIsCacheableOverride_OverridesDefaultBehavior_ToNotAllowed()
             Assert.False(responseCachingContext.RequestIsCacheable());
         }
 
-        private class RequestCacheabilityIgnoreOverride : IResponseCachingRequestCacheabilityValidator
-        {
-            public OverrideResult RequestIsCacheableOverride(HttpContext httpContext) => OverrideResult.UseDefaultLogic;
-        }
-
         [Fact]
         public void RequestIsCacheableOverride_IgnoreFallsBackToDefaultBehavior()
         {
             var httpContext = new DefaultHttpContext();
             httpContext.Request.Method = "GET";
-            var responseCachingContext = CreateTestContext(httpContext, new RequestCacheabilityIgnoreOverride());
+            var responseCachingContext = CreateTestContext(httpContext, new NoopResponseCachingRequestCacheabilityValidator());
 
             Assert.True(responseCachingContext.RequestIsCacheable());
 
@@ -391,11 +386,6 @@ public void ResponseIsCacheableOverride_OverridesDefaultBehavior_ToNotAllowed()
             Assert.False(responseCachingContext.ResponseIsCacheable());
         }
 
-        private class ResponseCacheabilityIgnoreOverride : IResponseCachingResponseCacheabilityValidator
-        {
-            public OverrideResult ResponseIsCacheableOverride(HttpContext httpContext) => OverrideResult.UseDefaultLogic;
-        }
-
         [Fact]
         public void ResponseIsCacheableOverride_IgnoreFallsBackToDefaultBehavior()
         {
@@ -405,7 +395,7 @@ public void ResponseIsCacheableOverride_IgnoreFallsBackToDefaultBehavior()
             {
                 Public = true
             };
-            var responseCachingContext = CreateTestContext(httpContext, new ResponseCacheabilityIgnoreOverride());
+            var responseCachingContext = CreateTestContext(httpContext, new NoopResponseCachingResponseCacheabilityValidator());
 
             Assert.True(responseCachingContext.ResponseIsCacheable());