runtime(zip): revert unintended change to zip#Write()

This was wrongly included as of patch 1c6734291295bf8aa39577840b40bb
because apparently I messed up the use of git apply :/

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/zip.vim b/runtime/autoload/zip.vim
index fdd1a15..d0e706e 100644
--- a/runtime/autoload/zip.vim
+++ b/runtime/autoload/zip.vim
@@ -307,7 +307,6 @@
   if has("unix")
    let zipfile = substitute(a:fname,'zipfile://\(.\{-}\)::[^\\].*$','\1','')
    let fname   = substitute(a:fname,'zipfile://.\{-}::\([^\\].*\)$','\1','')
-   let fname   = fnameescape(fname)
   else
    let zipfile = substitute(a:fname,'^.\{-}zipfile://\(.\{-}\)::[^\\].*$','\1','')
    let fname   = substitute(a:fname,'^.\{-}zipfile://.\{-}::\([^\\].*\)$','\1','')