[mono] Cleanup DISABLED_FEATURES variable (#90375)

We haven't populated it since moving to the cmake-based build system a couple years ago so it probably isn't worth doing now either.

src/mono/CMakeLists.txt

@@ -88,8 +88,6 @@ if(ENABLE_LAZY_GC_THREAD_CREATION)
   set(LAZY_GC_THREAD_CREATION 1)
 endif()
 
-set(DISABLED_FEATURES "\"\"")
-
 if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") OR(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"))
   set(GCC 1)
 endif()

src/mono/cmake/config.h.in

@@ -253,9 +253,6 @@
 /* Reduce runtime requirements (and capabilities) */
 #cmakedefine MONO_SMALL_CONFIG 1
 
-/* String of disabled features */
-#define DISABLED_FEATURES @DISABLED_FEATURES@
-
 /* Disable AOT Compiler */
 #cmakedefine DISABLE_AOT 1
 

src/mono/mono/mini/driver.c

@@ -1688,7 +1688,6 @@ mono_get_version_info (void)
 #endif
 
 	g_string_append_printf (output, "\tArchitecture:  %s\n", MONO_ARCHITECTURE);
-	g_string_append_printf (output, "\tDisabled:      %s\n", DISABLED_FEATURES);
 
 	g_string_append_printf (output, "\tMisc:          ");
 #ifdef MONO_SMALL_CONFIG