[5.7] Retract ~= for Regex.

Sources/_StringProcessing/Regex/Match.swift

@@ -166,14 +166,3 @@ extension BidirectionalCollection where SubSequence == Substring {
     try? r.regex.prefixMatch(in: self[...])
   }
 }
-
-@available(SwiftStdlib 5.7, *)
-extension RegexComponent {
-  public static func ~=(regex: Self, input: String) -> Bool {
-    input.wholeMatch(of: regex) != nil
-  }
-
-  public static func ~=(regex: Self, input: Substring) -> Bool {
-    input.wholeMatch(of: regex) != nil
-  }
-}

Tests/RegexBuilderTests/AlgorithmsTests.swift

@@ -104,66 +104,6 @@ class RegexConsumerTests: XCTestCase {
        result: "9+16, 3, 10, 99+1")
     )
   }
-
-  func testSwitches() {
-    // Failure cases
-    do {
-      switch "abcde" {
-      case Regex {
-        "a"
-        ZeroOrMore(.any)
-        "f"
-      }:
-        XCTFail()
-
-      case OneOrMore { CharacterClass.whitespace }:
-        XCTFail()
-
-      case "abc":
-        XCTFail()
-
-      case Regex {
-        "a"
-        "b"
-        "c"
-      }:
-        XCTFail()
-
-      default:
-        break
-      }
-    }
-    // Success cases
-    do {
-      let input = "abcde"
-
-      switch input {
-      case Regex {
-        "a"
-        ZeroOrMore(.any)
-        "e"
-      }:
-        break
-
-      default:
-        XCTFail()
-      }
-
-      guard case Regex({
-        "a"
-        ZeroOrMore(.any)
-        "e"
-      }) = input else {
-        XCTFail()
-        return
-      }
-
-      guard case OneOrMore(.word) = input else {
-        XCTFail()
-        return
-      }
-    }
-  }
 }
 
 class AlgorithmsResultBuilderTests: XCTestCase {

Tests/RegexTests/AlgorithmsTests.swift

@@ -497,19 +497,4 @@ class AlgorithmTests: XCTestCase {
     XCTAssertEqual(
       s2.ranges(of: try Regex("a*?")).map(s2.offsets(of:)), [0..<0, 1..<1, 2..<2])
   }
-
-  func testSwitches() {
-    switch "abcde" {
-    case try! Regex("a.*f"):
-      XCTFail()
-    case try! Regex("abc"):
-      XCTFail()
-
-    case try! Regex("a.*e"):
-      break // success
-
-    default:
-      XCTFail()
-    }
-  }
 }