eval stability tests in tester; tear out last pass' view rule extensions

src/eval/eval_ir.h

@@ -288,7 +288,8 @@ internal E_Expr *e_expr_irext_cast(Arena *arena, E_Expr *rhs, E_IRTreeAndType *r
 ////////////////////////////////
 //~ rjf: Expression & IR-Tree => Rules
 
-internal E_LookupRule *e_lookup_rule_from_irtree(E_IRTreeAndType *irtree);
+#if 0 // TODO(rjf): @eval
 internal E_LookupRuleTagPair e_lookup_rule_tag_pair_from_expr_irtree(E_Expr *expr, E_IRTreeAndType *irtree);
+#endif
 
 #endif // EVAL_IR_H