RFR: Remove NMethodSizeLimit adjustment for Shenandoah

[Aleksey Shipilev]

Turns out, this is not a good idea. AArch64 asserts later because some instructions become
non-encodable on C1 paths.

diff -r 551c72da087a src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp   Mon Sep 10 10:27:14 2018 +0200
+++ b/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp   Mon Sep 10 17:55:24 2018 +0200
@@ -179,10 +179,2 @@

-  // Shenandoah needs more space in generated code to put barriers in.
-  // TODO: NMethodSizeLimit should not be develop.
-#ifdef ASSERT
-  if (FLAG_IS_DEFAULT(NMethodSizeLimit)) {
-    FLAG_SET_DEFAULT(NMethodSizeLimit, NMethodSizeLimit * 3);
-  }
-#endif
-
   // Shenandoah needs more C2 nodes to compile some methods with lots of barriers.


Testing: tier3_gc_shenandoah (running)

Thanks,
-Aleksey