remove more duplicated colour names

Author: behackl

manim/utils/color/BS381.py

@@ -165,8 +165,6 @@
 CAMOUFLAGE_BEIGE = ManimColor("#B2A788")
 BS381_397 = ManimColor("#F3D163")
 JASMINE_YELLOW = ManimColor("#F3D163")
-BS381_410 = ManimColor("#93612B")
-LIGHT_BROWN = ManimColor("#93612B")
 BS381_411 = ManimColor("#74542F")
 MIDDLE_BROWN = ManimColor("#74542F")
 BS381_412 = ManimColor("#5C422E")
@@ -183,8 +181,6 @@
 CAMOUFLAGE_RED = ManimColor("#845B4D")
 BS381_436 = ManimColor("#564B47")
 DARK_CAMOUFLAGE_BROWN = ManimColor("#564B47")
-BS381_437 = ManimColor("#464334")
-VERY_DARK_DRAB = ManimColor("#464334")
 BS381_439 = ManimColor("#753B1E")
 ORANGE_BROWN = ManimColor("#753B1E")
 BS381_443 = ManimColor("#C98A71")
@@ -277,8 +273,6 @@
 LIGHT_SLATE_GREY = ManimColor("#667563")
 BS381_640 = ManimColor("#566164")
 EXTRA_DARK_SEA_GREY = ManimColor("#566164")
-BS381_641 = ManimColor("#484837")
-DARK_GREEN = ManimColor("#484837")
 BS381_642 = ManimColor("#282B2F")
 NIGHT = ManimColor("#282b2f")
 BS381_671 = ManimColor("#4E5355")