Revert "add equivalent"

This reverts commit bc1a2b7.

Author: cherylEnkidu

Firestore/Swift/Source/ExpressionImplementation.swift

@@ -373,6 +373,17 @@ extension Expression {
   func stringReplace(_ find: Expression, with replace: Expression) -> FunctionExpression {
     return FunctionExpression(functionName: "string_replace", args: [self, find, replace])
   }
+
+  // MARK: Equivalence Operations
+
+  /// Creates a `BooleanExpr` that returns `true` if this expression is equivalent
+  /// to the given value.
+  ///
+  /// - Parameter other: The value to compare against.
+  /// - Returns: A `BooleanExpr` that can be used in `where` clauses.
+  func equivalent(_ other: Sendable) -> BooleanExpression {
+    return BooleanExpression(functionName: "equivalent", args: [self, Helper.sendableToExpr(other)])
+  }
 }
 
 public extension Expression {
@@ -1010,8 +1021,4 @@ public extension Expression {
     let exprs = [self] + values.map { Helper.sendableToExpr($0) }
     return FunctionExpression(functionName: "concat", args: exprs)
   }
-
-  func equivalent(_ other: Sendable) -> BooleanExpression {
-    return BooleanExpression(functionName: "equivalent", args: [self, Helper.sendableToExpr(other)])
-  }
 }

Firestore/Swift/Source/SwiftAPI/Pipeline/Expressions/Expression.swift

@@ -1604,13 +1604,4 @@ public protocol Expression: Sendable {
   /// - Parameter values: The values to concatenate.
   /// - Returns: A new `FunctionExpression` representing the concatenated result.
   func concat(_ values: [Sendable]) -> FunctionExpression
-
-  // MARK: Equivalence Operations
-
-  /// Creates a `BooleanExpr` that returns `true` if this expression is equivalent
-  /// to the given value.
-  ///
-  /// - Parameter other: The value to compare against.
-  /// - Returns: A `BooleanExpr` that can be used in `where` clauses.
-  func equivalent(_ other: Sendable) -> BooleanExpression
 }

Firestore/Swift/Tests/Integration/PipelineTests.swift

@@ -1700,24 +1700,24 @@ class PipelineIntegrationTests: FSTIntegrationTestCase {
     TestHelper.compare(snapshot: snapshot, expected: expectedResults, enforceOrder: true)
   }
 
-  func testEquivalentWorks() async throws {
-    let collRef = collectionRef(withDocuments: [
-      "doc1": ["value": 1, "value2": 1],
-      "doc2": ["value": 1, "value2": 2],
-      "doc3": ["value": NSNull(), "value2": NSNull()],
-      "doc4": ["value": NSNull(), "value2": 1],
-      "doc5": ["value": Double.nan, "value2": Double.nan],
-      "doc6": ["value": Double.nan, "value2": 1],
-    ])
-    let db = collRef.firestore
-
-    let pipeline = db.pipeline()
-      .collection(collRef.path)
-      .where(Field("value").equivalent(Field("value2")))
-    let snapshot = try await pipeline.execute()
-
-    XCTAssertEqual(snapshot.results.count, 3)
-  }
+//  func testEquivalentWorks() async throws {
+//    let collRef = collectionRef(withDocuments: [
+//      "doc1": ["value": 1, "value2": 1],
+//      "doc2": ["value": 1, "value2": 2],
+//      "doc3": ["value": NSNull(), "value2": NSNull()],
+//      "doc4": ["value": NSNull(), "value2": 1],
+//      "doc5": ["value": Double.nan, "value2": Double.nan],
+//      "doc6": ["value": Double.nan, "value2": 1],
+//    ])
+//    let db = collRef.firestore
+//
+//    let pipeline = db.pipeline()
+//      .collection(collRef.path)
+//      .where(Field("value").equivalent(Field("value2")))
+//    let snapshot = try await pipeline.execute()
+//
+//    XCTAssertEqual(snapshot.results.count, 3)
+//  }
 
   func testInWorks() async throws {
     let collRef = collectionRef(withDocuments: bookDocs)