lint : fix the ruff linting issue

Author: Gopinath-Mahendiran

zulipterminal/themes/colors_gruvbox.py

@@ -32,7 +32,7 @@ class GruvBoxColor(Enum):
     DARK2            = 'black           h239      #504945'
     DARK3            = 'black           h241      #665c54'
     DARK4            = 'black           h243      #7c6f64'
-    DARK4_256        = 'black           h243      #7c6f64'
+
     # - generally foreground
     LIGHT2           = 'white           h250      #d5c4a1'
     # - grays
@@ -46,7 +46,6 @@ class GruvBoxColor(Enum):
     LIGHT0           = 'white           h229      #fbf1c7'
     LIGHT0_SOFT      = 'white           h228      #f2e5bc'
     LIGHT1           = 'white           h223      #ebdbb2'
-    LIGHT3           = 'light_gray      h248      #bdae93'
     LIGHT4_256       = 'light_gray      h246      #a89984'
 
     # Dark mode only - colors