git-gui: remove unused proc is_shellscript

Commit 7d076d56757c (git-gui: handle shell script text filters when
loading for blame, 2011-12-09) added is_shellscript to test if a file
is executable by the shell, used only when searching for textconv
filters. The previous commit rearranged the tests for finding such
filters, and removed the only user of is_shellscript. Remove this
function.

Signed-off-by: Mark Levedahl <mlevedahl@gmail.com>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Taylor Blau <me@ttaylorr.com>

diff --git a/git-gui.sh b/git-gui.sh
index cb0c02e5b8f439e3c6040f16e8b61c13e308a7ee..72da2443e5eb6e86e91b542e50bc7e05f4be1810 100755 (executable)
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -549,16 +549,6 @@ proc _git_cmd {name} {
        return $v
 }
 
-# Test a file for a hashbang to identify executable scripts on Windows.
-proc is_shellscript {filename} {
-       if {![file exists $filename]} {return 0}
-       set f [open $filename r]
-       fconfigure $f -encoding binary
-       set magic [read $f 2]
-       close $f
-       return [expr {$magic eq "#!"}]
-}
-
 # Run a shell command connected via pipes on stdout.
 # This is for use with textconv filters and uses sh -c "..." to allow it to
 # contain a command with arguments. We presume this