Remove Showkase from the project.

libraries/designsystem/build.gradle.kts

@@ -10,7 +10,6 @@ import extension.testCommonDependencies
 
 plugins {
     id("io.element.android-compose-library")
-    alias(libs.plugins.ksp)
     id("kotlin-parcelize")
 }
 
@@ -20,12 +19,6 @@ android {
     buildFeatures {
         buildConfig = true
     }
-
-    buildTypes {
-        getByName("release") {
-            consumerProguardFiles("consumer-rules.keep")
-        }
-    }
 }
 
 dependencies {
@@ -43,8 +36,5 @@ dependencies {
     implementation(projects.libraries.testtags)
     implementation(projects.libraries.uiStrings)
 
-    ksp(libs.showkase.processor)
-    implementation(libs.showkase)
-
     testCommonDependencies(libs)
 }