navbar: Remove redundant .emoji styles from scss.
navbar: Remove redundant .emoji styles from scss.

This commit fixes the alignment of emoji in the navbar by removing a
redundant style which was breaking the emoji alignment.

This block is probably just a remanent from WIP development of this
version of the navbar & its inclusion on master was as an oversight.

timabbott/zulip,andersk/zulip,shubhamdhama/zulip,zulip/zulip,hackerkid/zulip,rht/zulip,shubhamdhama/zulip,punchagan/zulip,shubhamdhama/zulip,shubhamdhama/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,zulip/zulip,brainwane/zulip,zulip/zulip,andersk/zulip,brainwane/zulip,zulip/zulip,zulip/zulip,brainwane/zulip,zulip/zulip,showell/zulip,brainwane/zulip,punchagan/zulip,rht/zulip,timabbott/zulip,rht/zulip,showell/zulip,brainwane/zulip,hackerkid/zulip,synicalsyntax/zulip,zulip/zulip,synicalsyntax/zulip,showell/zulip,eeshangarg/zulip,timabbott/zulip,timabbott/zulip,eeshangarg/zulip,hackerkid/zulip,synicalsyntax/zulip,kou/zulip,shubhamdhama/zulip,shubhamdhama/zulip,punchagan/zulip,synicalsyntax/zulip,andersk/zulip,timabbott/zulip,rht/zulip,timabbott/zulip,showell/zulip,showell/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,hackerkid/zulip,andersk/zulip,synicalsyntax/zulip,synicalsyntax/zulip,shubhamdhama/zulip,hackerkid/zulip,hackerkid/zulip,synicalsyntax/zulip,punchagan/zulip,showell/zulip,eeshangarg/zulip,timabbott/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,punchagan/zulip,kou/zulip,brainwane/zulip,rht/zulip,andersk/zulip,kou/zulip,kou/zulip,andersk/zulip,eeshangarg/zulip,brainwane/zulip,kou/zulip,eeshangarg/zulip,hackerkid/zulip,kou/zulip