tr_shader,tr_local: delete leftovers

collapseTextureEnv is not used at all

colorMap stage is by definition a map that is not collapsed
so this keyword is absolutely useless

src/engine/renderer/tr_local.h

@@ -1222,8 +1222,6 @@ static inline void halfToFloat( const f16vec4_t in, vec4_t out )
 		float          portalRange; // distance to fog out at
 		bool       isPortal;
 
-		int            collapseTextureEnv; // 0, GL_MODULATE, GL_ADD (FIXME: put in stage)
-
 		cullType_t     cullType; // CT_FRONT_SIDED, CT_BACK_SIDED, or CT_TWO_SIDED
 		bool       polygonOffset; // set for decals and other items that must be offset
 		float          polygonOffsetValue;

src/engine/renderer/tr_shader.cpp

@@ -2293,11 +2293,7 @@ static bool ParseStage( shaderStage_t *stage, const char **text )
 				continue;
 			}
 
-			if ( !Q_stricmp( token, "colorMap" ) )
-			{
-				stage->type = stageType_t::ST_COLORMAP;
-			}
-			else if ( !Q_stricmp( token, "diffuseMap" ) )
+			if ( !Q_stricmp( token, "diffuseMap" ) )
 			{
 				Log::Warn("deprecated stage parameter '%s' in shader '%s'", token, shader.name );
 				stage->type = stageType_t::ST_DIFFUSEMAP;