ClangImporter: Remove one last Swift 3 check

Author: slavapestov

lib/ClangImporter/ClangAdapter.cpp

@@ -741,11 +741,10 @@ OptionalTypeKind importer::getParamOptionality(version::Version swiftVersion,
     return OTK_None;
 
   // Check for the 'static' annotation on C arrays.
-  if (!swiftVersion.isVersion3())
-    if (const auto *DT = dyn_cast<clang::DecayedType>(paramTy))
-      if (const auto *AT = DT->getOriginalType()->getAsArrayTypeUnsafe())
-        if (AT->getSizeModifier() == clang::ArrayType::Static)
-          return OTK_None;
+  if (const auto *DT = dyn_cast<clang::DecayedType>(paramTy))
+    if (const auto *AT = DT->getOriginalType()->getAsArrayTypeUnsafe())
+      if (AT->getSizeModifier() == clang::ArrayType::Static)
+        return OTK_None;
 
   // Default to implicitly unwrapped optionals.
   return OTK_ImplicitlyUnwrappedOptional;