Libraries: Use default constructors/destructors in LibELF

https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules

"The compiler is more likely to get the default semantics right and
you cannot implement these functions better than the compiler."

Userland/Libraries/LibELF/Image.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, the SerenityOS developers.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -30,10 +31,6 @@ Image::Image(const u8* buffer, size_t size, bool verbose_logging)
 {
 }
 
-Image::~Image()
-{
-}
-
 StringView Image::section_index_to_string(unsigned index) const
 {
     VERIFY(m_valid);