Fix lint (2)

Author: kleisauke

lib/vips.rb

@@ -30,9 +30,8 @@ def library_name(name, abi_number)
     # check if the GLib DLLs are available. If these can not be found, we
     # assume that GLib is statically linked into libvips.
     begin
-      lib = FFI::DynamicLibrary.open("lib#{name}-#{abi_number}.dll",
+      FFI::DynamicLibrary.open("lib#{name}-#{abi_number}.dll",
         FFI::DynamicLibrary::RTLD_LAZY | FFI::DynamicLibrary::RTLD_LOCAL)
-      lib if lib
 
     # LoadError for JRuby, RuntimeError for TruffleRuby
     rescue LoadError, RuntimeError