Remove unused color tokens

Author: zsmb13

ui-components/src/commonMain/kotlin/org/jetbrains/kotlinconf/ui/theme/Colors.kt

@@ -30,7 +30,6 @@ import org.jetbrains.kotlinconf.ui.theme.UI.white80
 class Colors(
     val isDark: Boolean,
 
-    val activeBackground: Color,
     val mainBackground: Color,
     val primaryBackground: Color,
     val tileBackground: Color,
@@ -51,7 +50,6 @@ class Colors(
     val placeholderText: Color,
     val primaryText: Color,
     val primaryTextInverted: Color,
-    val purpleText: Color,
     val secondaryText: Color,
 
     val toggleOn: Color,
@@ -61,7 +59,6 @@ class Colors(
 val KotlinConfLightColors = Colors(
     isDark = false,
 
-    activeBackground = magenta20,
     mainBackground = white100,
     primaryBackground = magenta100,
     tileBackground = black05,
@@ -82,7 +79,6 @@ val KotlinConfLightColors = Colors(
     placeholderText = black20,
     primaryText = black100,
     primaryTextInverted = white100,
-    purpleText = purple100,
     secondaryText = black60,
 
     toggleOff = greyLight,
@@ -92,7 +88,6 @@ val KotlinConfLightColors = Colors(
 val KotlinConfDarkColors = Colors(
     isDark = true,
 
-    activeBackground = magenta50,
     mainBackground = black100,
     primaryBackground = magenta100,
     tileBackground = white10,
@@ -113,7 +108,6 @@ val KotlinConfDarkColors = Colors(
     placeholderText = white30,
     primaryText = white100,
     primaryTextInverted = white100,
-    purpleText = purpleTextDark,
     secondaryText = white70,
 
     toggleOff = greyDark,