LibC: Remove the LibPthread interface target

Author: https://github.com/timschumi
Commit: 5870484d1a
Pull-request: https://github.com/SerenityOS/serenity/pull/14453
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibC/CMakeLists.txt

@@ -180,7 +180,5 @@ target_link_libraries(LibC ssp system LibTimeZone)
 # We mark LibCStatic as a dependency of LibC because this triggers the build of the LibCStatic target
 add_dependencies(LibC LibM LibSystem LibCStatic)
 
-# Provide a dummy target and a linker script for LibPthread that tells everything to link against LibC instead.
-add_library(LibPthread INTERFACE)
-target_link_libraries(LibPthread INTERFACE LibC)
+# Provide a linker script instead of LibPthread that tells everything to link against LibC.
 file(WRITE "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_LIBDIR}/libpthread.so" "INPUT(libc.so)")