Revert "Special case Range#max for integer beginning and Float::Infinity end"

This reverts commit 05bf811c28.

range.c

@@ -1255,15 +1255,6 @@ range_max(int argc, VALUE *argv, VALUE range)
             return rb_funcall(e, '-', 1, INT2FIX(1));
         }
         if (RB_INTEGER_TYPE_P(b) && !RB_INTEGER_TYPE_P(e)) {
-            if (RB_TYPE_P(e, T_FLOAT)) {
-                VALUE inf = rb_funcall(e, rb_intern("infinite?"), 0);
-                if (inf != Qnil) {
-                  /* For backwards compatibility, return end if the end
-                   * is Float::Infinity and the beginning is integer.
-                     If end is -Float::Infinity, return nil. */
-                  return(inf == INT2FIX(1) ? e : Qnil);
-                }
-            }
             e = rb_funcall(e, rb_intern("floor"), 0);
         }
         return e;

test/ruby/test_range.rb

@@ -131,9 +131,6 @@ class TestRange < Test::Unit::TestCase
     assert_equal(2, (..2).max)
     assert_raise(TypeError) { (...2).max }
     assert_raise(TypeError) { (...2.0).max }
-
-    assert_equal(Float::INFINITY, (1..Float::INFINITY).max)
-    assert_nil((1..-Float::INFINITY).max)
   end
 
   def test_minmax
@@ -160,9 +157,6 @@ class TestRange < Test::Unit::TestCase
 
     assert_equal(['a', 'c'], ('a'..'c').minmax)
     assert_equal(['a', 'b'], ('a'...'c').minmax)
-
-    assert_equal([1, Float::INFINITY], (1..Float::INFINITY).minmax)
-    assert_equal([nil, nil], (1..-Float::INFINITY).minmax)
   end
 
   def test_initialize_twice