RFR(sh/11): Cleanup traversal leftover

[rkennke at redhat.com]

I am going over sh/jdk11 vs upstream diff and found this.

Testing: build sh/jdk11 fine

diff -r 2726a4c6b8a8 make/hotspot/lib/JvmOverrideFiles.gmk
--- a/make/hotspot/lib/JvmOverrideFiles.gmk     Mon Jun 15 14:11:43
2020 +0200
+++ b/make/hotspot/lib/JvmOverrideFiles.gmk     Thu Jun 18 18:28:21
2020 +0200
@@ -39,7 +39,6 @@
   ifeq ($(DEBUG_LEVEL), release)
     # Need extra inlining to collapse all marking code into the hot
marking loop
     BUILD_LIBJVM_shenandoahConcurrentMark.cpp_CXXFLAGS := --param
inline-unit-growth=1000
-    BUILD_LIBJVM_shenandoahTraversalGC.cpp_CXXFLAGS := --param inline-
unit-growth=1000
   endif
 endif