Revert "[Truffle] Add ImplicitCast from int to long." and related commits to check perf.

This reverts commit a483eac4ffd79122e4450198136a5abfee8288f2.
This reverts commit 375091582754a23f7d1ab464c03322689f64619b.
This reverts commit 2e4b534000e0c30440279734f32b1e2d70aa9413.