deparse-skips.txt: remove now-passing tests

t/op/hexfp.t and ext/XS-APItest/t/svpeek.t have both started surviving
a Deparse round trip. I haven't looked at why, but this commit
removes them from the list of expected failures.

Porting/deparse-skips.txt

@@ -54,7 +54,6 @@ op/attrhand.t             # Custom attrs ignored; also AH provides none
 op/caller.t
 op/goto.t
 op/gv.t                   # glob copy constants
-op/hexfp.t
 op/index.t
 op/join.t                 # mutability of folded constants
 op/length.t               # utf8ness of deparsed strings
@@ -256,7 +255,6 @@ uni/variables.t
 ../ext/XS-APItest/t/call_checker.t
 ../ext/XS-APItest/t/cleanup.t
 ../ext/XS-APItest/t/fetch_pad_names.t
-../ext/XS-APItest/t/svpeek.t
 ../ext/XS-APItest/t/synthetic_scope.t
 ../lib/Config.t                         # Config_heavy.pl fns getting output
 ../lib/charnames.t