Range#count spec fix: Range#count runs infinitely on endless ranges in 2.6

Author: Lillian Zhang

spec/ruby/core/range/count_spec.rb

@@ -1,17 +1,11 @@
 require_relative '../../spec_helper'
 
 describe "Range#count" do
-  ruby_version_is "2.6" do
-    it "returns Infinity for endless ranges without arguments or blocks" do
-      inf = Float::INFINITY
-      eval("('a'...)").count.should == inf
-      eval("(7..)").count.should == inf
-    end
-  end
-
   ruby_version_is "2.7" do
     it "returns Infinity for beginless ranges without arguments or blocks" do
       inf = Float::INFINITY
+      eval("('a'...)").count.should == inf
+      eval("(7..)").count.should == inf
       eval("(...'a')").count.should == inf
       eval("(...nil)").count.should == inf
       eval("(..10.0)").count.should == inf