Revert r63383, r63248 "compile.c: copy a short insn with leave"

	When copying `leave` insn, TRACE also should be copied if it is
	present, but this optimization is trivial and not worth the
	complexity.  [ruby-core:91366] [Bug #15578]

	4cae5353
	5afd479d

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67726 b2dd03c8-39d4-4d8f-98ff-823fe69b080e