Revert "Unskip passing tests related to double negative 0"

This reverts commit cdf6029c.

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenOperators.cs

@@ -3362,7 +3362,7 @@ static void Main()
 
         [WorkItem(539398, "DevDiv")]
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void TestFloatNegativeZero()
         {
             var text = @"
@@ -3398,7 +3398,7 @@ static void Main()
 
         [WorkItem(539398, "DevDiv")]
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void TestDoubleNegativeZero()
         {
             var text = @"
@@ -3435,7 +3435,7 @@ static void Main()
         // NOTE: decimal doesn't have infinity, so we convert to double.
         [WorkItem(539398, "DevDiv")]
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void TestDecimalNegativeZero()
         {
             var text = @"

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTests.cs

@@ -9702,7 +9702,7 @@ public static int Main()
 
         [WorkItem(528060, "DevDiv")]
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void DoubleDivByNegativeZero()
         {
             string source = @"
@@ -13058,7 +13058,7 @@ .maxstack  4
         }
 
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void NegativeZeroIsNotAZero()
         {
             var source = @"
@@ -13143,7 +13143,7 @@ .maxstack  5
         }
 
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void NegativeZeroIsNotAZero1()
         {
             var source = @"

src/Compilers/CSharp/Test/Semantic/Semantics/ConstantTests.cs

@@ -1391,7 +1391,7 @@ private static object ExtractValue(ConstantValue constantValue)
         /// </summary>
         [WorkItem(529730, "DevDiv")]
         [WorkItem(1043494, "DevDiv")]
-        [Fact]
+        [Fact(Skip = "1043494")]
         public void TestConstantFoldingDecimalOperations01()
         {
             var source =

src/EditorFeatures/Test2/Simplification/CastSimplificationTests.vb

@@ -2052,7 +2052,7 @@ class Program
 
         <WorkItem(529884)>
         <WorkItem(1043494, "DevDiv")>
-        <Fact, Trait(Traits.Feature, Traits.Features.Simplification)>
+        <Fact(Skip:="1043494"), Trait(Traits.Feature, Traits.Features.Simplification)>
         Public Sub Csharp_DoNotRemove_ParamDefaultValueNegativeZero()
             Dim input =
 <Workspace>
@@ -2110,7 +2110,7 @@ sealed class C : I
 
         <WorkItem(529884)>
         <WorkItem(1043494, "DevDiv")>
-        <Fact, Trait(Traits.Feature, Traits.Features.Simplification)>
+        <Fact(Skip:="1043494"), Trait(Traits.Feature, Traits.Features.Simplification)>
         Public Sub Csharp_DoNotRemove_ParamDefaultValueNegativeZero2()
             Dim input =
 <Workspace>