Enable global limits by default in production mixin (#1807)

Signed-off-by: Marco Pracucci <marco@pracucci.com>

production/ksonnet/loki/config.libsonnet

@@ -91,10 +91,6 @@
       'limits.per-user-override-config': '/etc/loki/overrides/overrides.yaml',
     },
 
-    // Global limits are currently opt-in only.
-    max_streams_global_limit_enabled: false,
-    ingestion_rate_global_limit_enabled: false,
-
     loki: {
       server: {
         graceful_shutdown_timeout: '5s',
@@ -141,10 +137,8 @@
         reject_old_samples: true,
         reject_old_samples_max_age: '168h',
         max_query_length: '12000h',  // 500 days
-      } + if !$._config.max_streams_global_limit_enabled then {} else {
-        max_streams_per_user: 0,
+        max_streams_per_user: 0, // Disabled in favor of the global limit
         max_global_streams_per_user: 10000,  // 10k
-      } + if !$._config.ingestion_rate_global_limit_enabled then {} else {
         ingestion_rate_strategy: 'global',
         ingestion_rate_mb: 10,
         ingestion_burst_size_mb: 20,
@@ -274,7 +268,6 @@
         },
       },
 
-    } + if !$._config.ingestion_rate_global_limit_enabled then {} else {
       distributor: {
         // Creates a ring between distributors, required by the ingestion rate global limit.
         ring: {