Drop allownonascii check from pre-commit checks

Supposedly, at this day and age, it is OK to use non-ascii file names.
Specifically, this is intended to allow such names for bugdocs, which
allows simpler testing of problems with handling those.

An alternative would be to rename bugdocs at runtime; but that still
requires that the target filesystem supports such names, so...

Change-Id: I25da2402f311d59c5777c4cd302147d6965dea5f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160217
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

.git-hooks/pre-commit

@@ -381,37 +381,6 @@ if ( system( "git rev-parse --verify HEAD >/dev/null 2>&1" ) == 0 )
     $against="HEAD"
 }
 
-# If you want to allow non-ascii filenames set this variable to true.
-my $allownonascii=`git config hooks.allownonascii`;
-chomp $allownonascii;
-
-# Cross platform projects tend to avoid non-ascii filenames; prevent
-# them from being added to the repository. We exploit the fact that the
-# printable range starts at the space character and ends with tilde.
-if ( $allownonascii ne "true" &&
-    # Note that the use of brackets around a tr range is ok here, (it's
-    # even required, for portability to Solaris 10's /usr/bin/tr), since
-    # the square bracket bytes happen to fall in the designated range.
-    `git diff --cached --name-only --diff-filter=A -z $against | \
-     LC_ALL=C tr -d '[ -~]\\0'` ne "" )
-{
-    print <<EOM;
-Error: Attempt to add a non-ascii file name.
-
-This can cause problems if you want to work
-with people on other platforms.
-
-To be portable it is advisable to rename the file ...
-
-If you know what you are doing you can disable this
-check using:
-
-  git config hooks.allownonascii true
-
-EOM
-    exit( 1 );
-}
-
 # Block large files.
 open( FILES, "git diff --cached --name-only --diff-filter=A -z $against |" ) ||  die "Cannot run git diff-index.";
 while (<FILES>)