chore: remove ai from default features

Author: dancixx

Cargo.toml

@@ -77,7 +77,7 @@ yahoo_finance_api = { version = "2.3.0", optional = true }
 [features]
 ai = ["dep:candle-core", "dep:candle-datasets", "dep:candle-nn", "dep:polars"]
 cuda = ["dep:cudarc", "dep:libloading"]
-default = ["f64", "ai"]
+default = ["f64"]
 f32 = []
 f64 = []
 jemalloc = ["dep:tikv-jemallocator"]