[Rspamd] Remove neural config due to massive fp

data/conf/rspamd/local.d/neural.conf

@@ -1,24 +0,0 @@
-rules {
-  "LONG" {
-    train {
-      max_trains = 200;
-      max_usages = 20;
-      max_iterations = 25;
-      learning_rate = 0.01,
-    }
-    symbol_spam = "NEURAL_SPAM_LONG";
-    symbol_ham = "NEURAL_HAM_LONG";
-    ann_expire = 45d;
-  }
-  "SHORT" {
-    train {
-      max_trains = 100;
-      max_usages = 10;
-      max_iterations = 15;
-      learning_rate = 0.01,
-    }
-    symbol_spam = "NEURAL_SPAM_SHORT";
-    symbol_ham = "NEURAL_HAM_SHORT";
-    ann_expire = 7d;
-  }
-}

data/conf/rspamd/local.d/neural_group.conf

@@ -1,18 +0,0 @@
-symbols = {
-  "NEURAL_SPAM_LONG" {
-    weight = 3.7; # sample weight
-    description = "Neural network spam (long)";
-  }
-  "NEURAL_HAM_LONG" {
-    weight = -4.0; # sample weight
-    description = "Neural network ham (long)";
-  }
-  "NEURAL_SPAM_SHORT" {
-    weight = 2.5; # sample weight
-    description = "Neural network spam (short)";
-  }
-  "NEURAL_HAM_SHORT" {
-    weight = -2.0; # sample weight
-    description = "Neural network ham (short)";
-  }
-}