gh-131152: Remove unused imports from Tools/cases_generator

Tools/cases_generator/analyzer.py

@@ -1,4 +1,4 @@
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 import itertools
 import lexer
 import parser

Tools/cases_generator/generators_common.py

@@ -2,7 +2,6 @@
 
 from analyzer import (
     Instruction,
-    Uop,
     Properties,
     StackItem,
     analysis_error,

Tools/cases_generator/optimizer_generator.py

@@ -21,7 +21,7 @@
     TokenIterator,
 )
 from cwriter import CWriter
-from typing import TextIO, Iterator
+from typing import TextIO
 from lexer import Token
 from stack import Local, Stack, StackError, Storage
 

Tools/cases_generator/stack.py

@@ -1,9 +1,8 @@
 import re
 from analyzer import StackItem, StackEffect, Instruction, Uop, PseudoInstruction
-from collections import defaultdict
 from dataclasses import dataclass
 from cwriter import CWriter
-from typing import Iterator, Tuple
+from typing import Iterator
 
 UNUSED = {"unused"}
 

Tools/cases_generator/tier1_generator.py

@@ -24,7 +24,7 @@
     Emitter,
 )
 from cwriter import CWriter
-from typing import TextIO, Callable
+from typing import TextIO
 from stack import Local, Stack, StackError, get_stack_effect, Storage
 
 DEFAULT_OUTPUT = ROOT / "Python/generated_cases.c.h"

Tools/cases_generator/tier2_generator.py

@@ -26,7 +26,7 @@
     always_true,
 )
 from cwriter import CWriter
-from typing import TextIO, Iterator
+from typing import TextIO
 from lexer import Token
 from stack import Local, Stack, StackError, Storage