Use abort function in MINIMAL_RUNTIME (#14908)

The abort runtime function exists in preamble_minimal.js as well as
preable.js so there is no reason not to use use (should be a code size
saving due to reduced duplication).

Author: sbc100

src/library.js

@@ -446,12 +446,7 @@ LibraryManager.library = {
   // and this function _abort(). Remove one of these, importing two functions for the same purpose is wasteful.
   abort__sig: 'v',
   abort: function() {
-#if MINIMAL_RUNTIME
-    // In MINIMAL_RUNTIME the module object does not exist, so its behavior to abort is to throw directly.
-    throw 'abort';
-#else
     abort();
-#endif
   },
 
   // This object can be modified by the user during startup, which affects