Merge pull request dotnet/corefx#1695 from KrzysztofCwalina/TestFix

Removes some tests that are now bogus

Commit migrated from dotnet/corefx@94c90ba

Author: KrzysztofCwalina

src/libraries/System.Text.Encodings.Web/tests/HtmlEncoderTests.cs

@@ -71,17 +71,6 @@ public void Default_EquivalentToBasicLatin()
             }
         }
 
-        [Fact]
-        public void Default_ReturnsSingletonInstance()
-        {
-            // Act
-            HtmlEncoder encoder1 = HtmlEncoder.Default;
-            HtmlEncoder encoder2 = HtmlEncoder.Default;
-
-            // Assert
-            Assert.Same(encoder1, encoder2);
-        }
-
         [Theory]
         [InlineData("<", "&lt;")]
         [InlineData(">", "&gt;")]

src/libraries/System.Text.Encodings.Web/tests/JavaScriptStringEncoderTests.cs

@@ -71,17 +71,6 @@ public void Default_EquivalentToBasicLatin()
             }
         }
 
-        [Fact]
-        public void Default_ReturnsSingletonInstance()
-        {
-            // Act
-            JavaScriptStringEncoder encoder1 = JavaScriptStringEncoder.Default;
-            JavaScriptStringEncoder encoder2 = JavaScriptStringEncoder.Default;
-
-            // Assert
-            Assert.Same(encoder1, encoder2);
-        }
-
         [Fact]
         public void JavaScriptStringEncode_AllRangesAllowed_StillEncodesForbiddenChars_Simple_Escaping() {
             // The following two calls could be simply InlineData to the Theory below

src/libraries/System.Text.Encodings.Web/tests/UrlEncoderTests.cs

@@ -75,17 +75,6 @@ public void Default_EquivalentToBasicLatin()
             }
         }
 
-        [Fact]
-        public void Default_ReturnsSingletonInstance()
-        {
-            // Act
-            UrlEncoder encoder1 = UrlEncoder.Default;
-            UrlEncoder encoder2 = UrlEncoder.Default;
-
-            // Assert
-            Assert.Same(encoder1, encoder2);
-        }
-
         [Fact]
         public void UrlEncode_AllRangesAllowed_StillEncodesForbiddenChars()
         {