remove load_env! as it's made unnecessary by foreman run

spec/foreman_spec.rb

@@ -8,24 +8,6 @@ describe Foreman do
     it { should be_a String }
   end
 
-  describe "::load_env!(env_file)", :fakefs do
-    after do
-      ENV['FOO'] = nil
-    end
-
-    it "should load env_file into ENV" do
-      File.open("/tmp/env1", "w") { |f| f.puts("FOO=bar") }
-      Foreman.load_env!("/tmp/env1")
-      ENV['FOO'].should == 'bar'
-    end
-
-    it "should assume env_file in ./.env" do
-      File.open("./.env", "w") { |f| f.puts("FOO=bar") }
-      Foreman.load_env!
-      ENV['FOO'].should == 'bar'
-    end
-  end
-
   describe "runner" do
     it "should exist" do
       File.exists?(Foreman.runner).should == true