- Drop unused static libhwy dependency when using shared libjxl

--- CMakeLists.txt.orig	2022-06-16 19:13:50 UTC
+++ CMakeLists.txt
@@ -565,13 +565,6 @@ if(CONFIG_AV1_ENCODER)
       if(LIBJXL_CFLAGS)
         append_compiler_flag("${LIBJXL_CFLAGS}")
       endif()
-      pkg_check_modules(LIBHWY REQUIRED libhwy)
-      target_link_libraries(aom PRIVATE ${LIBHWY_LDFLAGS} ${LIBHWY_LIBRARIES})
-      target_include_directories(aom_dsp_encoder
-                                 PRIVATE ${LIBLIBHWY_INCLUDE_DIRS})
-      if(LIBHWY_CFLAGS)
-        append_compiler_flag("${LIBHWY_CFLAGS}")
-      endif()
     endif()
 
     set_target_properties(aom PROPERTIES LINKER_LANGUAGE CXX)