Removes unused dependencies

The following dependencies are not used and have been removed:
  - `pest` and `pest_derive`,
  - `text_io`.

Author: Sasha

Cargo.toml

@@ -8,8 +8,5 @@ edition = "2018"
 
 [dependencies]
 dyn-clone = "*"
-pest = "*"
-pest_derive = "*"
 nom = "*"
-text_io = "*"
 rand = "*"