tools: Remove replace-tarball-shebang.
tools: Remove replace-tarball-shebang.

This was a temporary helper tool for part of
tools/build-release-tarball during our Python 3 migration, which
finished some time ago.

punchagan/zulip,tommyip/zulip,hackerkid/zulip,eeshangarg/zulip,timabbott/zulip,synicalsyntax/zulip,hackerkid/zulip,showell/zulip,dhcrzf/zulip,andersk/zulip,showell/zulip,jackrzhang/zulip,tommyip/zulip,dhcrzf/zulip,jackrzhang/zulip,hackerkid/zulip,dhcrzf/zulip,showell/zulip,kou/zulip,timabbott/zulip,rishig/zulip,showell/zulip,jackrzhang/zulip,rht/zulip,shubhamdhama/zulip,hackerkid/zulip,kou/zulip,jackrzhang/zulip,andersk/zulip,shubhamdhama/zulip,shubhamdhama/zulip,rishig/zulip,zulip/zulip,eeshangarg/zulip,tommyip/zulip,timabbott/zulip,rht/zulip,rht/zulip,dhcrzf/zulip,zulip/zulip,shubhamdhama/zulip,punchagan/zulip,dhcrzf/zulip,andersk/zulip,rht/zulip,tommyip/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip,synicalsyntax/zulip,timabbott/zulip,shubhamdhama/zulip,punchagan/zulip,kou/zulip,rht/zulip,synicalsyntax/zulip,hackerkid/zulip,rishig/zulip,brainwane/zulip,punchagan/zulip,synicalsyntax/zulip,eeshangarg/zulip,andersk/zulip,brainwane/zulip,timabbott/zulip,kou/zulip,tommyip/zulip,rishig/zulip,showell/zulip,tommyip/zulip,rishig/zulip,kou/zulip,punchagan/zulip,jackrzhang/zulip,showell/zulip,brainwane/zulip,jackrzhang/zulip,hackerkid/zulip,rishig/zulip,showell/zulip,punchagan/zulip,shubhamdhama/zulip,rishig/zulip,brainwane/zulip,punchagan/zulip,brainwane/zulip,dhcrzf/zulip,tommyip/zulip,eeshangarg/zulip,brainwane/zulip,jackrzhang/zulip,synicalsyntax/zulip,andersk/zulip,shubhamdhama/zulip,kou/zulip,dhcrzf/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,andersk/zulip,zulip/zulip,eeshangarg/zulip,brainwane/zulip,rht/zulip,zulip/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,eeshangarg/zulip,timabbott/zulip,zulip/zulip,hackerkid/zulip