Issue description:

• These keywords don't have any unique meaning; they only duplicate the functionality of the existing C-style curly bracket syntax.
• They can complicate diagnostics, causing counter-intuitive error messages, as shown in Bizzare error for invalid if #512.
• They were already removed in Pawn 3.3, so we could do the same in this fork.

Minimal complete verifiable example (MCVE):

Workspace Information:

• Compiler version: 3.10.10
• Command line arguments provided (or sampctl version):
• Operating System: