[test] Update test to reflect DCE

Author: milseman

test/stdlib/RuntimeObjC.swift

@@ -471,26 +471,6 @@ var nsStringCanaryCount = 0
   }
 }
 
-RuntimeFoundationWrappers.test("_stdlib_NSStringLowercaseString/NoLeak") {
-  nsStringCanaryCount = 0
-  autoreleasepool {
-    let a = NSStringCanary()
-    expectEqual(1, nsStringCanaryCount)
-    _stdlib_NSStringLowercaseString(a)
-  }
-  expectEqual(0, nsStringCanaryCount)
-}
-
-RuntimeFoundationWrappers.test("_stdlib_NSStringUppercaseString/NoLeak") {
-  nsStringCanaryCount = 0
-  autoreleasepool {
-    let a = NSStringCanary()
-    expectEqual(1, nsStringCanaryCount)
-    _stdlib_NSStringUppercaseString(a)
-  }
-  expectEqual(0, nsStringCanaryCount)
-}
-
 RuntimeFoundationWrappers.test("_stdlib_CFStringCreateCopy/NoLeak") {
   nsStringCanaryCount = 0
   autoreleasepool {