feat: Build and sign using my Yubikey

android/app/build.gradle

@@ -25,12 +25,6 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
-def keystoreProperties = new Properties()
-def keystorePropertiesFile = rootProject.file('key.properties')
-if (keystorePropertiesFile.exists()) {
-    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
-}
-
 android {
     compileSdkVersion 33
     ndkVersion flutter.ndkVersion
@@ -58,18 +52,9 @@ android {
         versionName flutterVersionName
     }
 
-    signingConfigs {
-      release {
-        keyAlias      keystoreProperties['keyAlias']
-        keyPassword   keystoreProperties['keyPassword']
-        storeFile     keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
-        storePassword keystoreProperties['storePassword']
-      }
-    }
-
     buildTypes {
         release {
-            signingConfig signingConfigs.release
+            signingConfig null
         }
     }
 }