dlib: remove nsl system lib (conan-io#28777)

conan-io#28774

Author: ericLemanissier

recipes/dlib/all/conanfile.py

@@ -213,6 +213,6 @@ def package_info(self):
         # INFO: Unix systems use dlib as library name, but on Windows it includes settings, e.g dlib19.24.0_release_64bit_msvc1933.lib
         self.cpp_info.libs = collect_libs(self)
         if self.settings.os in ["Linux", "FreeBSD"]:
-            self.cpp_info.system_libs = ["pthread", "nsl"]
+            self.cpp_info.system_libs = ["pthread"]
         elif self.settings.os == "Windows":
             self.cpp_info.system_libs = ["ws2_32", "winmm", "comctl32", "gdi32", "imm32"]