tests: Remove old import testing code.
tests: Remove old import testing code.

We will add the modified version of this code in the next commit.

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