Revert "Reland "Simplify constrained string generation in code generators""

This reverts commit c1a33c1.

Reason for revert: https://crbug.com/454201777

Original change's description:
> Reland "Simplify constrained string generation in code generators"
>
> This is a reland of commit 80ad045
> CQ and GitHub actions now use newer versions that shouldn't crash
> any more when compiling this for release builds.
>
> Original change's description:
> > Simplify constrained string generation in code generators
> >
> > Change-Id: I0ed4abed4a3ef0c7e150971ec58f0aae7e5b0982
> > Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/8591236
> > Auto-Submit: Matthias Liedtke <mliedtke@google.com>
> > Reviewed-by: Carl Smith <cffsmith@google.com>
> > Commit-Queue: Matthias Liedtke <mliedtke@google.com>
>
> Change-Id: I98d5ee50de6057e239d1fae2b0ce4a3dfb1af1bd
> Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/8687236
> Reviewed-by: Carl Smith <cffsmith@google.com>
> Commit-Queue: Matthias Liedtke <mliedtke@google.com>

Bug: 454201777
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I9f3fc81d632842c357b999a6b7c93602660a3f25
Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/8693758
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Michael Achenbach <machenbach@google.com>

Author: mi-ac

Sources/Fuzzilli/Base/ProgramBuilder.swift

@@ -483,36 +483,6 @@ public class ProgramBuilder {
         return probability(0.5) ? randomBuiltinMethodName() : randomCustomMethodName()
     }
 
-    private static func generateConstrained<T: Equatable>(
-            _ generator: () -> T,
-            notIn: any Collection<T>,
-            fallback: () -> T) -> T {
-        var result: T
-        var attempts = 0
-        repeat {
-            if attempts >= 10 {
-                return fallback()
-            }
-            result = generator()
-            attempts += 1
-        } while notIn.contains(result)
-        return result
-    }
-
-    // Generate a string not already contained in `notIn` using the provided `generator`. If it fails
-    // repeatedly, return a random string instead.
-    public func generateString(_ generator: () -> String, notIn: any Collection<String>) -> String {
-        Self.generateConstrained(generator, notIn: notIn,
-            fallback: {String.random(ofLength: Int.random(in: 1...5))})
-    }
-
-    // Find a random variable to use as a string that isn't contained in `notIn`. If it fails
-    // repeatedly, create a random string literal instead.
-    public func findOrGenerateStringLikeVariable(notIn: any Collection<Variable>) -> Variable {
-        return Self.generateConstrained(randomJsVariable, notIn: notIn,
-            fallback: {loadString(String.random(ofLength: Int.random(in: 1...5)))})
-    }
-
     // Settings and constants controlling the behavior of randomParameters() below.
     // This determines how many variables of a given type need to be visible before
     // that type is considered a candidate for a parameter type. For example, if this