fix(shared-libraries): stop aggressive dylib re-linking

This seems to be the cause of SVG rendering crashing, as it re-links
libiconv.2.dylib from /usr/lib/libiconv.2.dylib to
@executable_path/lib/lib/libiconv.2.dylib within libintl.8.dylib. When
this re-linking does not happen, SVG rendering works without crashing
Emacs.

Some further testing is needed by installing brew dependencies by
building them from source, in an attempt to get various libraries all
linking to homebrew-built versions, to get as many shared libraries as
possible embedded into the application bundle.

Fixes #12

build-emacs-for-macos

@@ -617,7 +617,6 @@ class LibEmbedder < AbstractEmbedder
     FileUtils.cd(File.dirname(app)) do
       copy_libs(binary)
       copy_extra_libs(extra_libs, binary) if extra_libs.any?
-      self_ref_libs(binary)
     end
   end
 
@@ -673,31 +672,6 @@ class LibEmbedder < AbstractEmbedder
     end
   end
 
-  def self_ref_libs(exe)
-    rel_path = Pathname.new(lib_dir).relative_path_from(
-      Pathname.new(File.dirname(exe))
-    ).to_s
-    lib_paths ||= Dir.glob("#{lib_dir}/*").select { |f| File.file?(f) }
-    libs = lib_paths.map { |f| File.basename(f) }
-
-    ([exe] + lib_paths).each do |bin_path|
-      `otool -L "#{bin_path}"`.split("\n")[1..-1].each do |line|
-        match = line.match(%r{^\s+(.+/(lib[^/ ]+))\s})
-        next unless match
-        next if match[1].start_with?('@executable_path/')
-        next unless libs.include?(match[2])
-
-        while_writable(bin_path) do
-          system(
-            'install_name_tool', '-change', match[1],
-            File.join('@executable_path', rel_path, match[2].to_s),
-            bin_path
-          )
-        end
-      end
-    end
-  end
-
   def while_writable(file)
     mode = File.stat(file).mode
     File.chmod(0o775, file)