fix!: remove haskell module (#1418)

Given how slow the Haskell module is (#1240), it is slowing down the entire prompt
from rendering when the module is active. This commit removes the module until we
can find a faster way to retreive the Haskell version.

src/configs/mod.rs

@@ -17,7 +17,6 @@ pub mod git_commit;
 pub mod git_state;
 pub mod git_status;
 pub mod go;
-pub mod haskell;
 pub mod hg_branch;
 pub mod hostname;
 pub mod java;