Cleanup test methods

Author: CyrusNajmabadi

src/Analyzers/CSharp/Tests/AddRequiredParentheses/AddRequiredExpressionParenthesesTests.cs

@@ -427,9 +427,8 @@ void M()
             """, RequireAllParenthesesForClarity);
 
     [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/79286")]
-    public async Task TestCoalescePrecedence4()
-    {
-        await TestMissingAsync(
+    public Task TestCoalescePrecedence4()
+        => TestMissingAsync(
             """
             class C
             {
@@ -439,7 +438,6 @@ void M()
                 }
             }
             """, RequireAllParenthesesForClarity);
-    }
 
     [Fact]
     public Task TestBitwisePrecedence1()

src/Analyzers/CSharp/Tests/ImplementInterface/ImplementInterfaceCodeFixTests.cs

@@ -5369,9 +5369,8 @@ public void Goo(byte x = 1)
             """);
 
     [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545736")]
-    public async Task TestCastedOptionalParameter1()
-    {
-        await TestWithAllCodeStyleOptionsOffAsync("""
+    public Task TestCastedOptionalParameter1()
+        => TestWithAllCodeStyleOptionsOffAsync("""
             using System;
             interface I
             {
@@ -5396,7 +5395,6 @@ public void Goo(ConsoleColor x = (ConsoleColor)(-1))
                 }
             }
             """);
-    }
 
     [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545737")]
     public Task TestCastedEnumValue()