Revert "CircleCI Android: Use git-crypt"

This reverts commit 27349bfbe3e9a8fcbc4bc832984960db8432704e.

Doesn't seem to work

.circleci/config.yml

@@ -20,8 +20,14 @@ jobs:
           name: Analyze
           command: flutter analyze
       - run:
-          name: Unlock Secrets
-          command: ./scripts/decrypt_secrets.sh
+          name: Decode Android key store
+          command: echo "$KEYSTORE" | base64 -di > android/app/keystore.jks
+      - run:
+          name: Create Google Play key
+          command: echo "$GOOGLE_PLAY_KEY" | base64 -di > android/google-play-api-key.json
+      - run:
+          name: Create Android Key file
+          command: echo "$ANDROID_KEY_FILE" | base64 -di > android/key.properties
       - run:
           name: Build
           command: ./scripts/build.sh