6706662: Remove workaround introduced in fix for 6624782

Summary: Remove workaround compiler options for instanceKlass.cpp and objArrayKlass.cpp.
Reviewed-by: ysr, jcoomes

make/solaris/makefiles/amd64.make

@@ -45,10 +45,6 @@ OPT_CFLAGS/os_solaris_x86_64.o = -xO1
 OPT_CFLAGS/generateOptoStub.o = -xO2
 OPT_CFLAGS/thread.o = -xO2
 
-# Work around for 6624782
-OPT_CFLAGS/instanceKlass.o = -Qoption ube -no_a2lf
-OPT_CFLAGS/objArrayKlass.o = -Qoption ube -no_a2lf
-
 else
 
 ifeq ("${Platform_compiler}", "gcc")