Traccar Client: remove 5.21-6.0 (58-61)

Outdated, failing builds.

metadata/org.traccar.client.yml

@@ -302,33 +302,6 @@ Builds:
     prebuild: sed -i -e '/com.google.gms/d' -e '/com.google.firebase/d' -e '/fabric/d'
         -e '/crashlytics/d' ../build.gradle build.gradle
 
-  - versionName: '5.21'
-    versionCode: 58
-    commit: v5.21
-    subdir: app
-    gradle:
-      - regular
-    prebuild: sed -i -e '/com.google.gms/d' -e '/com.google.firebase/d' -e '/fabric/d'
-        -e '/crashlytics/d' ../build.gradle build.gradle
-
-  - versionName: '5.23'
-    versionCode: 60
-    commit: v5.23
-    subdir: app
-    gradle:
-      - regular
-    prebuild: sed -i -e '/com.google.gms/d' -e '/com.google.firebase/d' -e '/fabric/d'
-        -e '/crashlytics/d' ../build.gradle build.gradle
-
-  - versionName: '6.0'
-    versionCode: 61
-    commit: v6.0
-    subdir: app
-    gradle:
-      - regular
-    prebuild: sed -i -e '/com.google.gms/d' -e '/com.google.firebase/d' -e '/fabric/d'
-        -e '/crashlytics/d' ../build.gradle build.gradle
-
   - versionName: '6.1'
     versionCode: 62
     commit: v6.1