diff --git a/src/c/select.php b/src/c/select.php
index 618c8cdc..329e9627 100644
--- a/src/c/select.php
+++ b/src/c/select.php
@@ -111,93 +111,6 @@ function first_keyx<Tk, Tv>(
   invariant_violation('%s: Expected at least one element.', __FUNCTION__);
 }
 
-/**
- * Returns the largest element of the given Traversable, or null if the
- * Traversable is empty.
- *
- * For non-numeric elements, see C\max_by.
- */
-function max<T as num>(
-  Traversable<T> $traversable,
-): ?T {
-  $result = null;
-  foreach ($traversable as $value) {
-    if ($result === null || $value > $result) {
-      $result = $value;
-    }
-  }
-  return $result;
-}
-
-/**
- * Returns the largest element of the given Traversable, or null if the
- * Traversable is empty.
- *
- * The value for comparison is determined by the given function. In the case of
- * duplicate numeric keys, later values overwrite previous ones.
- *
- * For numeric elements, see C\max.
- */
-function max_by<T>(
-  Traversable<T> $traversable,
-  (function(T): num) $num_func,
-): ?T {
-  $result = null;
-  $result_num = null;
-  foreach ($traversable as $value) {
-    $value_num = $num_func($value);
-    if ($result_num === null || $value_num >= $result_num) {
-      $result = $value;
-      $result_num = $value_num;
-    }
-  }
-  return $result;
-
-}
-
-/**
- * Returns the smallest element of the given Traversable, or null if the
- * Traversable is empty.
- *
- * For non-numeric elements, see C\min_by.
- */
-function min<T as num>(
-  Traversable<T> $traversable,
-): ?T {
-  $result = null;
-  foreach ($traversable as $value) {
-    if ($result === null || $value < $result) {
-      $result = $value;
-    }
-  }
-  return $result;
-}
-
-/**
- * Returns the smallest element of the given Traversable, or null if the
- * Traversable is empty.
- *
- * The value for comparison is determined by the given function. In the case of
- * duplicate numeric keys, later values overwrite previous ones.
- *
- * For numeric elements, see C\min.
- */
-function min_by<T>(
-  Traversable<T> $traversable,
-  (function(T): num) $num_func,
-): ?T {
-  $result = null;
-  $result_num = null;
-  foreach ($traversable as $value) {
-    $value_num = $num_func($value);
-    if ($result_num === null || $value_num <= $result_num) {
-      $result = $value;
-      $result_num = $value_num;
-    }
-  }
-  return $result;
-}
-
 /**
  * Returns the last element of the given Traversable, or null if the
  * Traversable is empty.
diff --git a/tests/c/CSelectTest.php b/tests/c/CSelectTest.php
index 12490c95..8d31b92a 100644
--- a/tests/c/CSelectTest.php
+++ b/tests/c/CSelectTest.php
@@ -266,126 +266,6 @@ public function testFirstKeyx<Tk, Tv>(
     }
   }
 
-  public static function provideTestMax(): array<mixed> {
-    return array(
-      tuple(
-        array(),
-        null,
-      ),
-      tuple(
-        Set {8, 6, 7, 5, 3, 0, 9},
-        9,
-      ),
-      tuple(
-        HackLibTestTraversables::getIterator(
-          array(8, 6, 7, 5, 3, 0, 9),
-        ),
-        9,
-      ),
-    );
-  }
-
-  /** @dataProvider provideTestMax */
-  public function testMax<T as num>(
-    Traversable<T> $traversable,
-    ?T $expected,
-  ): void {
-    expect(C\max($traversable))->toBeSame($expected);
-  }
-
-  public static function provideTestMaxBy(): array<mixed> {
-    return array(
-      tuple(
-        array(),
-        $x ==> $x,
-        null,
-      ),
-      tuple(
-        vec['the', 'quick', 'brown', 'fox'],
-        fun('strlen'),
-        'brown',
-      ),
-      tuple(
-        HackLibTestTraversables::getIterator(
-          array('the', 'quick', 'brown', 'fox'),
-        ),
-        fun('strlen'),
-        'brown',
-      ),
-    );
-  }
-
-  /** @dataProvider provideTestMaxBy */
-  public function testMaxBy<T>(
-    Traversable<T> $traversable,
-    (function(T): num) $num_func,
-    ?T $expected,
-  ): void {
-    expect(C\max_by($traversable, $num_func))->toBeSame($expected);
-  }
-
-  public static function provideTestMin(): array<mixed> {
-    return array(
-      tuple(
-        array(),
-        null,
-      ),
-      tuple(
-        Set {8, 6, 7, 5, 3, 0, 9},
-        0,
-      ),
-      tuple(
-        HackLibTestTraversables::getIterator(
-          array(8, 6, 7, 5, 3, 0, 9),
-        ),
-        0,
-      ),
-      tuple(
-        Vector {8, 6, 7, -5, -3, 0, 9},
-        -5,
-      ),
-    );
-  }
-
-  /** @dataProvider provideTestMin */
-  public function testMin<T as num>(
-    Traversable<T> $traversable,
-    ?T $expected,
-  ): void {
-    expect(C\min($traversable))->toBeSame($expected);
-  }
-
-  public static function provideTestMinBy(): array<mixed> {
-    return array(
-      tuple(
-        array(),
-        $x ==> $x,
-        null,
-      ),
-      tuple(
-        vec['the', 'quick', 'brown', 'fox'],
-        fun('strlen'),
-        'fox',
-      ),
-      tuple(
-        HackLibTestTraversables::getIterator(
-          array('the', 'quick', 'brown', 'fox'),
-        ),
-        fun('strlen'),
-        'fox',
-      ),
-    );
-  }
-
-  /** @dataProvider provideTestMinBy */
-  public function testMinBy<T>(
-    Traversable<T> $traversable,
-    (function(T): num) $num_func,
-    ?T $expected,
-  ): void {
-    expect(C\min_by($traversable, $num_func))->toBeSame($expected);
-  }
-
   public static function provideTestLast(): array<mixed> {
     return array(
       tuple(