Revert "fix #77: for system-wide installations on Linux, remove ' or …

…die ("copy $tmppath to $path failed: $!")' because it seems to be false alarm"

This reverts commit c0be772.

The bug has been fixed upstream: http://tug.org/svn/texlive/trunk/Master/tlpkg/TeXLive/TLPDB.pm?sortby=date&r1=50091&r2=50090&pathrev=50091

tools/install-base.sh

@@ -26,12 +26,6 @@ cd texlive
 TEXLIVE_INSTALL_ENV_NOCHECK=true TEXLIVE_INSTALL_NO_WELCOME=true ../install-tl-*/install-tl -profile=../texlive.profile
 rm -r ../install-tl-* ../texlive.profile install-tl.log
 
-# I believe one line is buggy in TLPDB.pm, causing the issue
-# https://github.com/yihui/tinytex/issues/77
-if [ "$1" = '--admin' ]; then
-  sed -i 's/ or die ("copy \$tmppath to \$path failed: \$!")//' tlpkg/TeXLive/TLPDB.pm
-fi
-
 cd bin/*
 if [ "$3" != '' ]; then
   ./tlmgr option repository "$3"