Simplify INSTRUCTION_SIZE check

Author: tomasr8

Tools/cases_generator/analyzer.py

@@ -1082,7 +1082,7 @@ def add_instruction(name: str) -> None:
 
 
 def is_instruction_size_macro(token: lexer.Token) -> bool:
-    return token.kind == "IDENTIFIER" and token.text == "INSTRUCTION_SIZE"
+    return token.text == "INSTRUCTION_SIZE"
 
 
 def get_instruction_size_for_uop(instructions: dict[str, Instruction], uop: Uop) -> int | None: