The additional bar you’re seeing isn’t part of the build output. It’s simply Sublime Text’s Status Bar, which displays the current cursor position (e.g., "Line 14, Column 24").
If you want to hide it, you can disable it just like any other UI element:
Via the menu
View -> Hide Status Bar
Via the command Palette:
Open the Command Palette (Ctrl+Shift+P or Cmd+Shift+P)
Run: View: Toggle Status Bar
Once disabled, only the build result panel will remain visible. You can toggle the Status Bar back on at any time using the same command.